Annotation of loncom/interface/lonnavmaps.pm, revision 1.530
1.481 foxr 1: # The LearningOnline Network with CAPA
1.2 www 2: # Navigate Maps Handler
1.1 www 3: #
1.530 ! raeburn 4: # $Id: lonnavmaps.pm,v 1.529 2017/03/08 02:51:08 raeburn Exp $
1.20 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.245 www 28: ###
1.2 www 29:
1.416 jms 30: =pod
31:
32: =head1 NAME
33:
1.435 raeburn 34: Apache::lonnavmaps - Subroutines to handle and render the navigation
1.416 jms 35:
36: =head1 SYNOPSIS
37:
38: Handles navigational maps.
39:
40: The main handler generates the navigational listing for the course,
41: the other objects export this information in a usable fashion for
42: other modules.
43:
44:
45: This is part of the LearningOnline Network with CAPA project
46: described at http://www.lon-capa.org.
47:
48:
49: =head1 OVERVIEW
50:
1.439 wenzelju 51: X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
1.416 jms 52: course structure and caches it in what is often referred to as the
53: "big hash" X<big hash>. You can see it if you are logged into
54: LON-CAPA, in a course, by going to /adm/test. (You may need to
55: tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
56: content of the hash will be under the heading "Big Hash".
57:
58: Big Hash contains, among other things, how resources are related
59: to each other (next/previous), what resources are maps, which
60: resources are being chosen to not show to the student (for random
61: selection), and a lot of other things that can take a lot of time
62: to compute due to the amount of data that needs to be collected and
63: processed.
64:
65: Apache::lonnavmaps provides an object model for manipulating this
66: information in a higher-level fashion than directly manipulating
67: the hash. It also provides access to several auxilary functions
68: that aren't necessarily stored in the Big Hash, but are a per-
69: resource sort of value, like whether there is any feedback on
70: a given resource.
71:
72: Apache::lonnavmaps also abstracts away branching, and someday,
73: conditions, for the times where you don't really care about those
74: things.
75:
76: Apache::lonnavmaps also provides fairly powerful routines for
77: rendering navmaps, and last but not least, provides the navmaps
78: view for when the user clicks the NAV button.
79:
80: B<Note>: Apache::lonnavmaps I<only> works for the "currently
81: logged in user"; if you want things like "due dates for another
82: student" lonnavmaps can not directly retrieve information like
83: that. You need the EXT function. This module can still help,
84: because many things, such as the course structure, are constant
85: between users, and Apache::lonnavmaps can help by providing
86: symbs for the EXT call.
87:
88: The rest of this file will cover the provided rendering routines,
89: which can often be used without fiddling with the navmap object at
90: all, then documents the Apache::lonnavmaps::navmap object, which
91: is the key to accessing the Big Hash information, covers the use
92: of the Iterator (which provides the logic for traversing the
93: somewhat-complicated Big Hash data structure), documents the
94: Apache::lonnavmaps::Resource objects that are returned by
95:
96: =head1 Subroutine: render
97:
98: The navmap renderer package provides a sophisticated rendering of the
99: standard navigation maps interface into HTML. The provided nav map
100: handler is actually just a glorified call to this.
101:
102: Because of the large number of parameters this function accepts,
103: instead of passing it arguments as is normal, pass it in an anonymous
104: hash with the desired options.
105:
106: The package provides a function called 'render', called as
107: Apache::lonnavmaps::render({}).
108:
109: =head2 Overview of Columns
110:
111: The renderer will build an HTML table for the navmap and return
112: it. The table consists of several columns, and a row for each
113: resource (or possibly each part). You tell the renderer how many
114: columns to create and what to place in each column, optionally using
115: one or more of the prepared columns, and the renderer will assemble
116: the table.
117:
118: Any additional generally useful column types should be placed in the
119: renderer code here, so anybody can use it anywhere else. Any code
120: specific to the current application (such as the addition of <input>
121: elements in a column) should be placed in the code of the thing using
122: the renderer.
123:
124: At the core of the renderer is the array reference COLS (see Example
125: section below for how to pass this correctly). The COLS array will
126: consist of entries of one of two types of things: Either an integer
127: representing one of the pre-packaged column types, or a sub reference
128: that takes a resource reference, a part number, and a reference to the
129: argument hash passed to the renderer, and returns a string that will
130: be inserted into the HTML representation as it.
131:
132: All other parameters are ways of either changing how the columns
133: are printing, or which rows are shown.
134:
135: The pre-packaged column names are refered to by constants in the
136: Apache::lonnavmaps namespace. The following currently exist:
137:
138: =over 4
139:
140: =item * B<Apache::lonnavmaps::resource>:
141:
142: The general info about the resource: Link, icon for the type, etc. The
143: first column in the standard nav map display. This column provides the
144: indentation effect seen in the B<NAV> screen. This column also accepts
145: the following parameters in the renderer hash:
146:
147: =over 4
148:
149: =item * B<resource_nolink>: default false
150:
151: If true, the resource will not be linked. By default, all non-folder
152: resources are linked.
153:
154: =item * B<resource_part_count>: default true
155:
156: If true, the resource will show a part count B<if> the full
157: part list is not displayed. (See "condense_parts" later.) If false,
158: the resource will never show a part count.
159:
160: =item * B<resource_no_folder_link>:
161:
162: If true, the resource's folder will not be clickable to open or close
163: it. Default is false. True implies printCloseAll is false, since you
164: can't close or open folders when this is on anyhow.
165:
1.493 raeburn 166: =item * B<map_no_edit_link>:
167:
168: If true, the title of the folder or page will not be followed by an
169: icon/link to direct editing of a folder or composite page, originally
170: added via the Course Editor.
171:
1.416 jms 172: =back
173:
174: =item * B<Apache::lonnavmaps::communication_status>:
175:
176: Whether there is discussion on the resource, email for the user, or
177: (lumped in here) perl errors in the execution of the problem. This is
178: the second column in the main nav map.
179:
180: =item * B<Apache::lonnavmaps::quick_status>:
181:
182: An icon for the status of a problem, with five possible states:
183: Correct, incorrect, open, awaiting grading (for a problem where the
184: computer's grade is suppressed, or the computer can't grade, like
185: essay problem), or none (not open yet, not a problem). The
186: third column of the standard navmap.
187:
188: =item * B<Apache::lonnavmaps::long_status>:
189:
190: A text readout of the details of the current status of the problem,
191: such as "Due in 22 hours". The fourth column of the standard navmap.
192:
193: =item * B<Apache::lonnavmaps::part_status_summary>:
194:
195: A text readout summarizing the status of the problem. If it is a
196: single part problem, will display "Correct", "Incorrect",
197: "Not yet open", "Open", "Attempted", or "Error". If there are
198: multiple parts, this will output a string that in HTML will show a
199: status of how many parts are in each status, in color coding, trying
200: to match the colors of the icons within reason.
1.1 www 201:
1.416 jms 202: Note this only makes sense if you are I<not> showing parts. If
203: C<showParts> is true (see below), this column will not output
204: anything.
1.2 www 205:
1.416 jms 206: =back
1.133 bowersj2 207:
1.416 jms 208: If you add any others please be sure to document them here.
1.133 bowersj2 209:
1.416 jms 210: An example of a column renderer that will show the ID number of a
211: resource, along with the part name if any:
1.140 bowersj2 212:
1.416 jms 213: sub {
214: my ($resource, $part, $params) = @_;
215: if ($part) { return '<td>' . $resource->{ID} . ' ' . $part . '</td>'; }
216: return '<td>' . $resource->{ID} . '</td>';
217: }
1.135 bowersj2 218:
1.416 jms 219: Note these functions are responsible for the TD tags, which allow them
220: to override vertical and horizontal alignment, etc.
1.133 bowersj2 221:
1.416 jms 222: =head2 Parameters
1.130 www 223:
1.416 jms 224: Minimally, you should be
225: able to get away with just using 'cols' (to specify the columns
226: shown), 'url' (necessary for the folders to link to the current screen
227: correctly), and possibly 'queryString' if your app calls for it. In
228: that case, maintaining the state of the folders will be done
229: automatically.
1.268 albertel 230:
1.416 jms 231: =over 4
1.268 albertel 232:
1.483 raeburn 233: =item * B<iterator>: default: constructs one from %env
1.51 bowersj2 234:
1.416 jms 235: A reference to a fresh ::iterator to use from the navmaps. The
236: rendering will reflect the options passed to the iterator, so you can
237: use that to just render a certain part of the course, if you like. If
238: one is not passed, the renderer will attempt to construct one from
239: env{'form.filter'} and env{'form.condition'} information, plus the
240: 'iterator_map' parameter if any.
1.51 bowersj2 241:
1.416 jms 242: =item * B<iterator_map>: default: not used
1.51 bowersj2 243:
1.416 jms 244: If you are letting the renderer do the iterator handling, you can
245: instruct the renderer to render only a particular map by passing it
246: the source of the map you want to process, like
247: '/res/103/jerf/navmap.course.sequence'.
1.51 bowersj2 248:
1.416 jms 249: =item * B<include_top_level_map>: default: false
1.51 bowersj2 250:
1.416 jms 251: If you need to include the top level map (meaning the course) in the
252: rendered output set this to true
1.51 bowersj2 253:
1.416 jms 254: =item * B<navmap>: default: constructs one from %env
1.51 bowersj2 255:
1.416 jms 256: A reference to a navmap, used only if an iterator is not passed in. If
257: this is necessary to make an iterator but it is not passed in, a new
258: one will be constructed based on env info. This is useful to do basic
259: error checking before passing it off to render.
1.51 bowersj2 260:
1.416 jms 261: =item * B<r>: default: must be passed in
1.53 bowersj2 262:
1.416 jms 263: The standard Apache response object. This must be passed to the
264: renderer or the course hash will be locked.
1.53 bowersj2 265:
1.416 jms 266: =item * B<cols>: default: empty (useless)
1.407 raeburn 267:
1.416 jms 268: An array reference
1.53 bowersj2 269:
1.416 jms 270: =item * B<showParts>:default true
1.115 bowersj2 271:
1.416 jms 272: A flag. If true, a line for the resource itself, and a line
273: for each part will be displayed. If not, only one line for each
274: resource will be displayed.
1.115 bowersj2 275:
1.416 jms 276: =item * B<condenseParts>: default true
1.115 bowersj2 277:
1.416 jms 278: A flag. If true, if all parts of the problem have the same
279: status and that status is Nothing Set, Correct, or Network Failure,
280: then only one line will be displayed for that resource anyhow. If no,
281: all parts will always be displayed. If showParts is 0, this is
282: ignored.
1.115 bowersj2 283:
1.416 jms 284: =item * B<jumpCount>: default: determined from %env
1.115 bowersj2 285:
1.416 jms 286: A string identifying the URL to place the anchor 'curloc' at.
287: It is the responsibility of the renderer user to
288: ensure that the #curloc is in the URL. By default, determined through
289: the use of the env{} 'jump' information, and should normally "just
290: work" correctly.
1.177 www 291:
1.416 jms 292: =item * B<here>: default: empty string
1.68 bowersj2 293:
1.416 jms 294: A Symb identifying where to place the 'here' marker. The empty
295: string means no marker.
1.73 bowersj2 296:
1.416 jms 297: =item * B<indentString>: default: 25 pixel whitespace image
1.347 www 298:
1.416 jms 299: A string identifying the indentation string to use.
1.347 www 300:
1.416 jms 301: =item * B<queryString>: default: empty
1.346 foxr 302:
1.416 jms 303: A string which will be prepended to the query string used when the
304: folders are opened or closed. You can use this to pass
305: application-specific values.
1.73 bowersj2 306:
1.416 jms 307: =item * B<url>: default: none
1.73 bowersj2 308:
1.416 jms 309: The url the folders will link to, which should be the current
310: page. Required if the resource info column is shown, and you
311: are allowing the user to open and close folders.
1.73 bowersj2 312:
1.416 jms 313: =item * B<currentJumpIndex>: default: no jumping
1.73 bowersj2 314:
1.416 jms 315: Describes the currently-open row number to cause the browser to jump
316: to, because the user just opened that folder. By default, pulled from
317: the Jump information in the env{'form.*'}.
1.73 bowersj2 318:
1.416 jms 319: =item * B<printKey>: default: false
1.101 bowersj2 320:
1.416 jms 321: If true, print the key that appears on the top of the standard
322: navmaps.
1.73 bowersj2 323:
1.416 jms 324: =item * B<printCloseAll>: default: true
1.73 bowersj2 325:
1.416 jms 326: If true, print the "Close all folders" or "open all folders"
327: links.
1.403 albertel 328:
1.416 jms 329: =item * B<filterFunc>: default: sub {return 1;} (accept everything)
1.346 foxr 330:
1.416 jms 331: A function that takes the resource object as its only parameter and
332: returns a true or false value. If true, the resource is displayed. If
333: false, it is simply skipped in the display.
1.346 foxr 334:
1.416 jms 335: =item * B<suppressEmptySequences>: default: false
1.346 foxr 336:
1.416 jms 337: If you're using a filter function, and displaying sequences to orient
338: the user, then frequently some sequences will be empty. Setting this to
339: true will cause those sequences not to display, so as not to confuse the
340: user into thinking that if the sequence is there there should be things
341: under it; for example, see the "Show Uncompleted Homework" view on the
342: B<NAV> screen.
1.73 bowersj2 343:
1.416 jms 344: =item * B<suppressNavmaps>: default: false
1.53 bowersj2 345:
1.416 jms 346: If true, will not display Navigate Content resources.
1.51 bowersj2 347:
1.416 jms 348: =back
1.133 bowersj2 349:
1.416 jms 350: =head2 Additional Info
1.174 albertel 351:
1.416 jms 352: In addition to the parameters you can pass to the renderer, which will
353: be passed through unchange to the column renderers, the renderer will
354: generate the following information which your renderer may find
355: useful:
1.174 albertel 356:
1.416 jms 357: =over 4
1.174 albertel 358:
1.416 jms 359: =item * B<counter>:
1.133 bowersj2 360:
1.416 jms 361: Contains the number of rows printed. Useful after calling the render
362: function, as you can detect whether anything was printed at all.
1.216 bowersj2 363:
1.416 jms 364: =item * B<isNewBranch>:
1.216 bowersj2 365:
1.416 jms 366: Useful for renderers: If this resource is currently the first resource
367: of a new branch, this will be true. The Resource column (leftmost in the
368: navmaps screen) uses this to display the "new branch" icon
1.216 bowersj2 369:
1.416 jms 370: =back
1.216 bowersj2 371:
1.416 jms 372: =cut
1.216 bowersj2 373:
374:
1.416 jms 375: =head1 SUBROUTINES
1.216 bowersj2 376:
1.416 jms 377: =over
1.216 bowersj2 378:
1.416 jms 379: =item update()
1.133 bowersj2 380:
1.416 jms 381: =item addToFilter()
1.133 bowersj2 382:
1.416 jms 383: Convenience functions: Returns a string that adds or subtracts
384: the second argument from the first hash, appropriate for the
385: query string that determines which folders to recurse on
1.174 albertel 386:
1.416 jms 387: =item removeFromFilter()
1.51 bowersj2 388:
1.416 jms 389: =item getLinkForResource()
1.51 bowersj2 390:
1.416 jms 391: Convenience function: Given a stack returned from getStack on the iterator,
392: return the correct src() value.
1.174 albertel 393:
1.416 jms 394: =item getDescription()
1.174 albertel 395:
1.416 jms 396: Convenience function: This separates the logic of how to create
397: the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
398: etc.) into a separate function. It takes a resource object as the
399: first parameter, and the part number of the resource as the second.
400: It's basically a big switch statement on the status of the resource.
1.174 albertel 401:
1.416 jms 402: =item dueInLessThan24Hours()
1.216 bowersj2 403:
1.416 jms 404: Convenience function, so others can use it: Is the problem due in less than 24 hours, and still can be done?
1.51 bowersj2 405:
1.416 jms 406: =item lastTry()
1.51 bowersj2 407:
1.416 jms 408: Convenience function, so others can use it: Is there only one try remaining for the
409: part, with more than one try to begin with, not due yet and still can be done?
1.51 bowersj2 410:
1.416 jms 411: =item advancedUser()
1.51 bowersj2 412:
1.416 jms 413: This puts a human-readable name on the env variable.
1.51 bowersj2 414:
1.416 jms 415: =item timeToHumanString()
1.51 bowersj2 416:
1.416 jms 417: timeToHumanString takes a time number and converts it to a
418: human-readable representation, meant to be used in the following
419: manner:
1.174 albertel 420:
1.416 jms 421: =over 4
1.51 bowersj2 422:
1.416 jms 423: =item * print "Due $timestring"
1.133 bowersj2 424:
1.416 jms 425: =item * print "Open $timestring"
1.133 bowersj2 426:
1.416 jms 427: =item * print "Answer available $timestring"
1.144 bowersj2 428:
1.133 bowersj2 429: =back
1.51 bowersj2 430:
1.416 jms 431: Very, very, very, VERY English-only... goodness help a localizer on
432: this func...
1.174 albertel 433:
1.417 jms 434: =item resource()
1.174 albertel 435:
1.417 jms 436: returns 0
1.51 bowersj2 437:
1.417 jms 438: =item communication_status()
1.51 bowersj2 439:
1.417 jms 440: returns 1
1.174 albertel 441:
1.417 jms 442: =item quick_status()
1.51 bowersj2 443:
1.417 jms 444: returns 2
1.225 bowersj2 445:
1.417 jms 446: =item long_status()
1.225 bowersj2 447:
1.417 jms 448: returns 3
1.225 bowersj2 449:
1.417 jms 450: =item part_status_summary()
1.51 bowersj2 451:
1.417 jms 452: returns 4
1.51 bowersj2 453:
1.417 jms 454: =item render_resource()
1.51 bowersj2 455:
1.417 jms 456: =item render_communication_status()
1.51 bowersj2 457:
1.417 jms 458: =item render_quick_status()
459:
460: =item render_long_status()
461:
462: =item render_parts_summary_status()
463:
464: =item setDefault()
465:
466: =item cmp_title()
467:
468: =item render()
469:
470: =item add_linkitem()
471:
1.476 raeburn 472: =item show_linkitems_toolbar()
1.130 www 473:
1.416 jms 474: =back
1.115 bowersj2 475:
1.416 jms 476: =cut
1.140 bowersj2 477:
1.416 jms 478: package Apache::lonnavmaps;
1.51 bowersj2 479:
1.416 jms 480: use strict;
481: use GDBM_File;
482: use Apache::loncommon();
483: use Apache::lonenc();
484: use Apache::lonlocal;
485: use Apache::lonnet;
1.465 foxr 486: use Apache::lonmap;
1.443 foxr 487:
1.416 jms 488: use POSIX qw (floor strftime);
489: use Time::HiRes qw( gettimeofday tv_interval );
490: use LONCAPA;
491: use DateTime();
1.486 raeburn 492: use HTML::Entities;
1.465 foxr 493:
494: # For debugging
495:
1.499 raeburn 496: #use Data::Dumper;
1.465 foxr 497:
498:
1.416 jms 499: # symbolic constants
500: sub SYMB { return 1; }
501: sub URL { return 2; }
502: sub NOTHING { return 3; }
1.174 albertel 503:
1.416 jms 504: # Some data
1.174 albertel 505:
1.416 jms 506: my $resObj = "Apache::lonnavmaps::resource";
1.174 albertel 507:
1.443 foxr 508: # Keep these mappings in sync with lonquickgrades, which usesthe colors
1.416 jms 509: # instead of the icons.
510: my %statusIconMap =
511: (
512: $resObj->CLOSED => '',
513: $resObj->OPEN => 'navmap.open.gif',
514: $resObj->CORRECT => 'navmap.correct.gif',
515: $resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
516: $resObj->INCORRECT => 'navmap.wrong.gif',
517: $resObj->ATTEMPTED => 'navmap.ellipsis.gif',
518: $resObj->ERROR => ''
519: );
1.401 albertel 520:
1.438 wenzelju 521: my %iconAltTags = #texthash does not work here
1.439 wenzelju 522: ( 'navmap.correct.gif' => 'Correct',
523: 'navmap.wrong.gif' => 'Incorrect',
1.462 christia 524: 'navmap.open.gif' => 'Is Open',
1.439 wenzelju 525: 'navmap.partial.gif' => 'Partially Correct',
526: 'navmap.ellipsis.gif' => 'Attempted',
527: );
1.401 albertel 528:
1.416 jms 529: # Defines a status->color mapping, null string means don't color
530: my %colormap =
531: ( $resObj->NETWORK_FAILURE => '',
532: $resObj->CORRECT => '',
533: $resObj->EXCUSED => '#3333FF',
534: $resObj->PAST_DUE_ANSWER_LATER => '',
535: $resObj->PAST_DUE_NO_ANSWER => '',
536: $resObj->ANSWER_OPEN => '#006600',
537: $resObj->OPEN_LATER => '',
538: $resObj->TRIES_LEFT => '',
539: $resObj->INCORRECT => '',
540: $resObj->OPEN => '',
541: $resObj->NOTHING_SET => '',
542: $resObj->ATTEMPTED => '',
1.450 raeburn 543: $resObj->CREDIT_ATTEMPTED => '',
1.416 jms 544: $resObj->ANSWER_SUBMITTED => '',
545: $resObj->PARTIALLY_CORRECT => '#006600'
546: );
547: # And a special case in the nav map; what to do when the assignment
548: # is not yet done and due in less than 24 hours
549: my $hurryUpColor = "#FF0000";
1.174 albertel 550:
1.416 jms 551: sub addToFilter {
552: my $hashIn = shift;
553: my $addition = shift;
554: my %hash = %$hashIn;
555: $hash{$addition} = 1;
1.174 albertel 556:
1.416 jms 557: return join (",", keys(%hash));
558: }
1.174 albertel 559:
1.416 jms 560: sub removeFromFilter {
561: my $hashIn = shift;
562: my $subtraction = shift;
563: my %hash = %$hashIn;
1.174 albertel 564:
1.416 jms 565: delete $hash{$subtraction};
566: return join(",", keys(%hash));
567: }
1.174 albertel 568:
1.416 jms 569: sub getLinkForResource {
570: my $stack = shift;
571: my $res;
1.174 albertel 572:
1.416 jms 573: # Check to see if there are any pages in the stack
574: foreach $res (@$stack) {
575: if (defined($res)) {
576: my $anchor;
577: if ($res->is_page()) {
578: foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; } }
579: $anchor=&escape($anchor->shown_symb());
580: return ($res->link(),$res->shown_symb(),$anchor);
581: }
582: # in case folder was skipped over as "only sequence"
583: my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
584: if ($map=~/\.page$/) {
585: my $url=&Apache::lonnet::clutter($map);
1.437 foxr 586: $anchor=&escape($res->shown_symb());
1.416 jms 587: return ($url,$res->shown_symb(),$anchor);
588: }
589: }
590: }
1.174 albertel 591:
1.416 jms 592: # Failing that, return the src of the last resource that is defined
593: # (when we first recurse on a map, it puts an undefined resource
594: # on the bottom because $self->{HERE} isn't defined yet, and we
595: # want the src for the map anyhow)
596: foreach my $item (@$stack) {
597: if (defined($item)) { $res = $item; }
598: }
1.174 albertel 599:
1.416 jms 600: if ($res) {
601: return ($res->link(),$res->shown_symb());
602: }
603: return;
604: }
1.174 albertel 605:
1.417 jms 606:
1.140 bowersj2 607:
1.416 jms 608: sub getDescription {
609: my $res = shift;
610: my $part = shift;
611: my $status = $res->status($part);
1.92 bowersj2 612:
1.416 jms 613: my $open = $res->opendate($part);
614: my $due = $res->duedate($part);
615: my $answer = $res->answerdate($part);
1.164 bowersj2 616:
1.416 jms 617: if ($status == $res->NETWORK_FAILURE) {
618: return &mt("Having technical difficulties; please check status later");
619: }
620: if ($status == $res->NOTHING_SET) {
1.494 raeburn 621: return &Apache::lonhtmlcommon::direct_parm_link(&mt('Not currently assigned'),$res->symb(),'opendate',$part);
1.416 jms 622: }
623: if ($status == $res->OPEN_LATER) {
1.467 www 624: return &mt("Open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($open,'start'),$res->symb(),'opendate',$part));
1.416 jms 625: }
1.509 raeburn 626: my $slotinfo;
1.432 raeburn 627: if ($res->simpleStatus($part) == $res->OPEN) {
628: unless (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
629: my ($slot_status,$slot_time,$slot_name)=$res->check_for_slot($part);
1.509 raeburn 630: my $slotmsg;
1.432 raeburn 631: if ($slot_status == $res->UNKNOWN) {
1.509 raeburn 632: $slotmsg = &mt('Reservation status unknown');
1.432 raeburn 633: } elsif ($slot_status == $res->RESERVED) {
1.509 raeburn 634: $slotmsg = &mt('Reserved - ends [_1]',
1.433 bisitz 635: timeToHumanString($slot_time,'end'));
1.432 raeburn 636: } elsif ($slot_status == $res->RESERVED_LOCATION) {
1.509 raeburn 637: $slotmsg = &mt('Reserved - specific location(s) - ends [_1]',
1.433 bisitz 638: timeToHumanString($slot_time,'end'));
1.432 raeburn 639: } elsif ($slot_status == $res->RESERVED_LATER) {
1.509 raeburn 640: $slotmsg = &mt('Reserved - next open [_1]',
1.433 bisitz 641: timeToHumanString($slot_time,'start'));
1.432 raeburn 642: } elsif ($slot_status == $res->RESERVABLE) {
1.509 raeburn 643: $slotmsg = &mt('Reservable, reservations close [_1]',
1.433 bisitz 644: timeToHumanString($slot_time,'end'));
1.432 raeburn 645: } elsif ($slot_status == $res->RESERVABLE_LATER) {
1.509 raeburn 646: $slotmsg = &mt('Reservable, reservations open [_1]',
1.433 bisitz 647: timeToHumanString($slot_time,'start'));
1.432 raeburn 648: } elsif ($slot_status == $res->NOT_IN_A_SLOT) {
1.509 raeburn 649: $slotmsg = &mt('Reserve a time/place to work');
1.432 raeburn 650: } elsif ($slot_status == $res->NOTRESERVABLE) {
1.509 raeburn 651: $slotmsg = &mt('Reservation not available');
1.432 raeburn 652: } elsif ($slot_status == $res->WAITING_FOR_GRADE) {
1.509 raeburn 653: $slotmsg = &mt('Submission in grading queue');
654: }
655: if ($slotmsg) {
656: if ($res->is_task() || !$due) {
657: return $slotmsg;
658: }
659: $slotinfo = (' ' x 2).'('.$slotmsg.')';
1.432 raeburn 660: }
661: }
662: }
1.416 jms 663: if ($status == $res->OPEN) {
664: if ($due) {
665: if ($res->is_practice()) {
1.509 raeburn 666: return &mt("Closes [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'duedate',$part)).$slotinfo;
1.416 jms 667: } else {
1.509 raeburn 668: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)).$slotinfo;
1.416 jms 669: }
670: } else {
1.509 raeburn 671: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Open, no due date"),$res->symb(),'duedate',$part).$slotinfo;
1.416 jms 672: }
673: }
674: if ($status == $res->PAST_DUE_ANSWER_LATER) {
1.467 www 675: return &mt("Answer open [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($answer,'start'),$res->symb(),'answerdate',$part));
1.416 jms 676: }
677: if ($status == $res->PAST_DUE_NO_ANSWER) {
678: if ($res->is_practice()) {
1.467 www 679: return &mt("Closed [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'start'),$res->symb(),'answerdate,duedate',$part));
1.416 jms 680: } else {
1.467 www 681: return &mt("Was due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'answerdate,duedate',$part));
1.416 jms 682: }
683: }
684: if (($status == $res->ANSWER_OPEN || $status == $res->PARTIALLY_CORRECT)
685: && $res->handgrade($part) ne 'yes') {
1.455 www 686: return &Apache::lonhtmlcommon::direct_parm_link(&mt("Answer available"),$res->symb(),'answerdate,duedate',$part);
1.416 jms 687: }
688: if ($status == $res->EXCUSED) {
689: return &mt("Excused by instructor");
690: }
691: if ($status == $res->ATTEMPTED) {
1.444 raeburn 692: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
693: return &mt("Survey submission recorded");
694: } else {
695: return &mt("Answer submitted, not yet graded");
696: }
1.416 jms 697: }
1.450 raeburn 698: if ($status == $res->CREDIT_ATTEMPTED) {
699: if ($res->is_anonsurvey($part) || $res->is_survey($part)) {
700: return &mt("Credit for survey submission");
701: }
702: }
1.416 jms 703: if ($status == $res->TRIES_LEFT) {
704: my $tries = $res->tries($part);
705: my $maxtries = $res->maxtries($part);
706: my $triesString = "";
707: if ($tries && $maxtries) {
1.488 bisitz 708: $triesString = '<span class="LC_fontsize_medium"><i>('.&mt('[_1] of [quant,_2,try,tries] used',$tries,$maxtries).')</i></span>';
1.416 jms 709: if ($maxtries > 1 && $maxtries - $tries == 1) {
710: $triesString = "<b>$triesString</b>";
711: }
712: }
713: if ($due) {
1.467 www 714: return &mt("Due [_1]",&Apache::lonhtmlcommon::direct_parm_link(&timeToHumanString($due,'end'),$res->symb(),'duedate',$part)) .
1.416 jms 715: " $triesString";
716: } else {
1.455 www 717: return &Apache::lonhtmlcommon::direct_parm_link(&mt("No due date"),$res->symb(),'duedate',$part)." $triesString";
1.416 jms 718: }
719: }
720: if ($status == $res->ANSWER_SUBMITTED) {
721: return &mt('Answer submitted');
722: }
723: }
1.92 bowersj2 724:
1.51 bowersj2 725:
1.416 jms 726: sub dueInLessThan24Hours {
727: my $res = shift;
728: my $part = shift;
729: my $status = $res->status($part);
1.55 bowersj2 730:
1.416 jms 731: return ($status == $res->OPEN() ||
732: $status == $res->TRIES_LEFT()) &&
733: $res->duedate($part) && $res->duedate($part) < time()+(24*60*60) &&
734: $res->duedate($part) > time();
735: }
1.84 bowersj2 736:
1.417 jms 737:
1.416 jms 738: sub lastTry {
739: my $res = shift;
740: my $part = shift;
1.115 bowersj2 741:
1.416 jms 742: my $tries = $res->tries($part);
743: my $maxtries = $res->maxtries($part);
744: return $tries && $maxtries && $maxtries > 1 &&
745: $maxtries - $tries == 1 && $res->duedate($part) &&
746: $res->duedate($part) > time();
747: }
1.55 bowersj2 748:
1.51 bowersj2 749:
1.416 jms 750: sub advancedUser {
751: return $env{'request.role.adv'};
752: }
1.51 bowersj2 753:
1.416 jms 754: sub timeToHumanString {
755: my ($time,$type,$format) = @_;
1.153 bowersj2 756:
1.416 jms 757: # zero, '0' and blank are bad times
758: if (!$time) {
759: return &mt('never');
760: }
761: unless (&Apache::lonlocal::current_language()=~/^en/) {
762: return &Apache::lonlocal::locallocaltime($time);
763: }
764: my $now = time();
1.174 albertel 765:
1.416 jms 766: # Positive = future
767: my $delta = $time - $now;
1.190 bowersj2 768:
1.416 jms 769: my $minute = 60;
770: my $hour = 60 * $minute;
771: my $day = 24 * $hour;
772: my $week = 7 * $day;
773: my $inPast = 0;
1.190 bowersj2 774:
1.416 jms 775: # Logic in comments:
776: # Is it now? (extremely unlikely)
777: if ( $delta == 0 ) {
778: return "this instant";
779: }
1.174 albertel 780:
1.416 jms 781: if ($delta < 0) {
782: $inPast = 1;
783: $delta = -$delta;
784: }
1.143 bowersj2 785:
1.416 jms 786: if ( $delta > 0 ) {
1.51 bowersj2 787:
1.416 jms 788: my $tense = $inPast ? " ago" : "";
789: my $prefix = $inPast ? "" : "in ";
790:
791: # Less than a minute
792: if ( $delta < $minute ) {
793: if ($delta == 1) { return "${prefix}1 second$tense"; }
794: return "$prefix$delta seconds$tense";
795: }
1.51 bowersj2 796:
1.416 jms 797: # Less than an hour
798: if ( $delta < $hour ) {
1.464 raeburn 799: # If so, use minutes; or minutes, seconds (if format requires)
1.416 jms 800: my $minutes = floor($delta / 60);
1.464 raeburn 801: if (($format ne '') && ($format =~ /\%(T|S)/)) {
802: my $display;
803: if ($minutes == 1) {
804: $display = "${prefix}1 minute";
805: } else {
806: $display = "$prefix$minutes minutes";
807: }
808: my $seconds = $delta % $minute;
809: if ($seconds == 0) {
810: $display .= $tense;
811: } elsif ($seconds == 1) {
812: $display .= ", 1 second$tense";
813: } else {
814: $display .= ", $seconds seconds$tense";
815: }
816: return $display;
817: }
1.416 jms 818: if ($minutes == 1) { return "${prefix}1 minute$tense"; }
819: return "$prefix$minutes minutes$tense";
820: }
821:
822: # Is it less than 24 hours away? If so,
1.464 raeburn 823: # display hours + minutes, (and + seconds, if format specified it)
1.416 jms 824: if ( $delta < $hour * 24) {
825: my $hours = floor($delta / $hour);
826: my $minutes = floor(($delta % $hour) / $minute);
827: my $hourString = "$hours hours";
828: my $minuteString = ", $minutes minutes";
829: if ($hours == 1) {
830: $hourString = "1 hour";
831: }
832: if ($minutes == 1) {
833: $minuteString = ", 1 minute";
834: }
835: if ($minutes == 0) {
836: $minuteString = "";
837: }
1.464 raeburn 838: if (($format ne '') && ($format =~ /\%(T|S)/)) {
839: my $display = "$prefix$hourString$minuteString";
840: my $seconds = $delta-(($hours * $hour)+($minutes * $minute));
841: if ($seconds == 0) {
842: $display .= $tense;
843: } elsif ($seconds == 1) {
844: $display .= ", 1 second$tense";
845: } else {
846: $display .= ", $seconds seconds$tense";
847: }
848: return $display;
849: }
1.416 jms 850: return "$prefix$hourString$minuteString$tense";
851: }
1.174 albertel 852:
1.464 raeburn 853: # Date/time is more than 24 hours away
854:
1.416 jms 855: my $dt = DateTime->from_epoch(epoch => $time)
856: ->set_time_zone(&Apache::lonlocal::gettimezone());
1.216 bowersj2 857:
1.464 raeburn 858: # If there's a caller supplied format, use it, unless it only displays
859: # H:M:S or H:M.
1.145 bowersj2 860:
1.464 raeburn 861: if (($format ne '') && ($format ne '%T') && ($format ne '%R')) {
1.416 jms 862: my $timeStr = $dt->strftime($format);
863: return $timeStr.' ('.$dt->time_zone_short_name().')';
864: }
1.216 bowersj2 865:
1.416 jms 866: # Less than 5 days away, display day of the week and
867: # HH:MM
1.216 bowersj2 868:
1.416 jms 869: if ( $delta < $day * 5 ) {
870: my $timeStr = $dt->strftime("%A, %b %e at %I:%M %P (%Z)");
871: $timeStr =~ s/12:00 am/00:00/;
872: $timeStr =~ s/12:00 pm/noon/;
873: return ($inPast ? "last " : "this ") .
874: $timeStr;
875: }
876:
877: my $conjunction='on';
878: if ($type eq 'start') {
879: $conjunction='at';
880: } elsif ($type eq 'end') {
881: $conjunction='by';
882: }
883: # Is it this year?
884: my $dt_now = DateTime->from_epoch(epoch => $now)
885: ->set_time_zone(&Apache::lonlocal::gettimezone());
886: if ( $dt->year() == $dt_now->year()) {
887: # Return on Month Day, HH:MM meridian
888: my $timeStr = $dt->strftime("$conjunction %A, %b %e at %I:%M %P (%Z)");
889: $timeStr =~ s/12:00 am/00:00/;
890: $timeStr =~ s/12:00 pm/noon/;
891: return $timeStr;
892: }
1.59 bowersj2 893:
1.416 jms 894: # Not this year, so show the year
895: my $timeStr =
896: $dt->strftime("$conjunction %A, %b %e %Y at %I:%M %P (%Z)");
897: $timeStr =~ s/12:00 am/00:00/;
898: $timeStr =~ s/12:00 pm/noon/;
899: return $timeStr;
900: }
901: }
1.59 bowersj2 902:
903:
1.133 bowersj2 904: sub resource { return 0; }
905: sub communication_status { return 1; }
906: sub quick_status { return 2; }
907: sub long_status { return 3; }
1.225 bowersj2 908: sub part_status_summary { return 4; }
1.51 bowersj2 909:
1.133 bowersj2 910: sub render_resource {
911: my ($resource, $part, $params) = @_;
1.51 bowersj2 912:
1.477 raeburn 913: my $editmapLink;
1.133 bowersj2 914: my $nonLinkedText = ''; # stuff after resource title not in link
1.51 bowersj2 915:
1.134 bowersj2 916: my $link = $params->{"resourceLink"};
1.512 raeburn 917: if ($resource->ext()) {
918: $link =~ s/\#.+(\?)/$1/g;
919: }
1.306 foxr 920:
921: # The URL part is not escaped at this point, but the symb is...
922:
1.134 bowersj2 923: my $src = $resource->src();
924: my $it = $params->{"iterator"};
1.133 bowersj2 925: my $filter = $it->{FILTER};
926:
927: my $title = $resource->compTitle();
1.258 albertel 928:
1.133 bowersj2 929: my $partLabel = "";
930: my $newBranchText = "";
1.298 albertel 931: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
1.133 bowersj2 932: # If this is a new branch, label it so
933: if ($params->{'isNewBranch'}) {
1.429 droeschl 934: $newBranchText = "<img src='$location/branch.gif' alt=".mt('Branch')." />";
1.51 bowersj2 935: }
936:
1.133 bowersj2 937: # links to open and close the folder
1.306 foxr 938:
1.427 droeschl 939: my $whitespace = $location.'/whitespace_21.gif';
940: my $linkopen = "<img src='$whitespace' alt='' />"."<a href=\"$link\">";
1.133 bowersj2 941: my $linkclose = "</a>";
1.51 bowersj2 942:
1.204 albertel 943: # Default icon: unknown page
1.426 droeschl 944: my $icon = "<img class=\"LC_contentImage\" src='$location/unknown.gif' alt='' />";
1.133 bowersj2 945:
946: if ($resource->is_problem()) {
1.192 bowersj2 947: if ($part eq '0' || $params->{'condensed'}) {
1.426 droeschl 948: $icon = '<img class="LC_contentImage" src="'.$location.'/';
1.389 albertel 949: if ($resource->is_task()) {
950: $icon .= 'task.gif" alt="'.&mt('Task');
951: } else {
952: $icon .= 'problem.gif" alt="'.&mt('Problem');
953: }
1.426 droeschl 954: $icon .='" />';
1.133 bowersj2 955: } else {
956: $icon = $params->{'indentString'};
957: }
1.204 albertel 958: } else {
1.426 droeschl 959: $icon = "<img class=\"LC_contentImage\" src='".&Apache::loncommon::icon($resource->src)."' alt='' />";
1.133 bowersj2 960: }
1.51 bowersj2 961:
1.133 bowersj2 962: # Display the correct map icon to open or shut map
963: if ($resource->is_map()) {
964: my $mapId = $resource->map_pc();
965: my $nowOpen = !defined($filter->{$mapId});
966: if ($it->{CONDITION}) {
967: $nowOpen = !$nowOpen;
968: }
1.426 droeschl 969:
1.205 bowersj2 970: my $folderType = $resource->is_sequence() ? 'folder' : 'page';
1.362 www 971: my $title=$resource->title;
1.426 droeschl 972: $title=~s/\"/\&qout;/g;
1.144 bowersj2 973: if (!$params->{'resource_no_folder_link'}) {
1.205 bowersj2 974: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.426 droeschl 975: $icon = "<img src='$location/arrow." . ($nowOpen ? 'closed' : 'open') . ".gif' alt='' />"
976: ."<img class=\"LC_contentImage\" src='$location/$icon' alt=\""
977: .($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.349 foxr 978: $linkopen = "<a href=\"" . $params->{'url'} . '?' .
1.392 albertel 979: $params->{'queryString'} . '&filter=';
1.144 bowersj2 980: $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
981: addToFilter($filter, $mapId) :
982: removeFromFilter($filter, $mapId);
1.392 albertel 983: $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='
984: . $params->{'hereType'} . '&here=' .
1.384 www 985: &escape($params->{'here'}) .
1.392 albertel 986: '&jump=' .
1.384 www 987: &escape($resource->symb()) .
1.392 albertel 988: "&folderManip=1\">";
1.306 foxr 989:
1.144 bowersj2 990: } else {
991: # Don't allow users to manipulate folder
1.426 droeschl 992: $icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
1.427 droeschl 993: $icon = "<img class=\"LC_space\" src='$whitespace' alt='' />"."<img class=\"LC_contentImage\" src='$location/$icon' alt=\"".($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" />";
1.144 bowersj2 994:
995: $linkopen = "";
996: $linkclose = "";
997: }
1.525 raeburn 998: if (((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
999: (&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) &&
1.477 raeburn 1000: ($resource->symb=~/\_\_\_[^\_]+\_\_\_uploaded/)) {
1.493 raeburn 1001: if (!$params->{'map_no_edit_link'}) {
1002: my $icon = &Apache::loncommon::lonhttpdurl('/res/adm/pages').'/editmap.png';
1003: $editmapLink=' '.
1.495 raeburn 1004: '<a href="/adm/coursedocs?command=directnav&symb='.&escape($resource->symb()).'">'.
1.477 raeburn 1005: '<img src="'.$icon.'" alt="'.&mt('Edit Content').'" title="'.&mt('Edit Content').'" />'.
1006: '</a>';
1.493 raeburn 1007: }
1.477 raeburn 1008: }
1.518 raeburn 1009: if ($params->{'mapHidden'} || $resource->randomout()) {
1010: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1011: }
1012: } else {
1013: if ($resource->randomout()) {
1014: $nonLinkedText .= ' <span class="LC_warning">('.&mt('hidden').')</span> ';
1015: }
1.133 bowersj2 1016: }
1.342 albertel 1017: if (!$resource->condval()) {
1.458 bisitz 1018: $nonLinkedText .= ' <span class="LC_info">('.&mt('conditionally hidden').')</span> ';
1.342 albertel 1019: }
1.413 www 1020: if (($resource->is_practice()) && ($resource->is_raw_problem())) {
1.488 bisitz 1021: $nonLinkedText .=' <span class="LC_info"><b>'.&mt('not graded').'</b></span>';
1.412 www 1022: }
1.426 droeschl 1023:
1.133 bowersj2 1024: # We're done preparing and finally ready to start the rendering
1.426 droeschl 1025: my $result = '<td class="LC_middle">';
1026: my $newfolderType = $resource->is_sequence() ? 'folder' : 'page';
1027:
1.140 bowersj2 1028: my $indentLevel = $params->{'indentLevel'};
1029: if ($newBranchText) { $indentLevel--; }
1030:
1.133 bowersj2 1031: # print indentation
1.140 bowersj2 1032: for (my $i = 0; $i < $indentLevel; $i++) {
1.133 bowersj2 1033: $result .= $params->{'indentString'};
1.84 bowersj2 1034: }
1035:
1.133 bowersj2 1036: # Decide what to display
1037: $result .= "$newBranchText$linkopen$icon$linkclose";
1038:
1039: my $curMarkerBegin = '';
1040: my $curMarkerEnd = '';
1.51 bowersj2 1041:
1.133 bowersj2 1042: # Is this the current resource?
1.158 bowersj2 1043: if (!$params->{'displayedHereMarker'} &&
1044: $resource->symb() eq $params->{'here'} ) {
1.477 raeburn 1045: unless ($resource->is_map()) {
1046: $curMarkerBegin = '<span class="LC_current_nav_location">';
1047: $curMarkerEnd = '</span>';
1048: }
1.424 schulted 1049: $params->{'displayedHereMarker'} = 1;
1.51 bowersj2 1050: }
1051:
1.192 bowersj2 1052: if ($resource->is_problem() && $part ne '0' &&
1.133 bowersj2 1053: !$params->{'condensed'}) {
1.274 matthew 1054: my $displaypart=$resource->part_display($part);
1.363 albertel 1055: $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
1.384 www 1056: if ($link!~/\#/) { $link.='#'.&escape($part); }
1.133 bowersj2 1057: $title = "";
1.51 bowersj2 1058: }
1059:
1.163 bowersj2 1060: if ($params->{'condensed'} && $resource->countParts() > 1) {
1.363 albertel 1061: $nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
1.51 bowersj2 1062: }
1063:
1.266 raeburn 1064: if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
1.490 raeburn 1065: $result .= "$curMarkerBegin<a href=\"$link\">$title$partLabel</a>$curMarkerEnd$editmapLink$nonLinkedText</td>";
1.144 bowersj2 1066: } else {
1.477 raeburn 1067: $result .= "$curMarkerBegin$linkopen$title$partLabel</a>$curMarkerEnd$editmapLink$nonLinkedText</td>";
1.144 bowersj2 1068: }
1.51 bowersj2 1069:
1.133 bowersj2 1070: return $result;
1071: }
1.51 bowersj2 1072:
1.133 bowersj2 1073: sub render_communication_status {
1074: my ($resource, $part, $params) = @_;
1.134 bowersj2 1075: my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";
1076:
1077: my $link = $params->{"resourceLink"};
1.445 droeschl 1078: my $linkopen = "<a href=\"$link\">";
1.134 bowersj2 1079: my $linkclose = "</a>";
1.298 albertel 1080: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.477 raeburn 1081:
1.134 bowersj2 1082: if ($resource->hasDiscussion()) {
1083: $discussionHTML = $linkopen .
1.442 wenzelju 1084: '<img alt="'.&mt('New Discussion').'" src="'.$location.'/chat.gif" title="'.&mt('New Discussion').'"/>' .
1.134 bowersj2 1085: $linkclose;
1086: }
1087:
1088: if ($resource->getFeedback()) {
1089: my $feedback = $resource->getFeedback();
1.394 raeburn 1090: foreach my $msgid (split(/\,/, $feedback)) {
1091: if ($msgid) {
1.445 droeschl 1092: $feedbackHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1093: . &escape($msgid) . '">'
1.442 wenzelju 1094: . '<img alt="'.&mt('New E-mail').'" src="'.$location.'/feedback.gif" title="'.&mt('New E-mail').'"/></a>';
1.134 bowersj2 1095: }
1096: }
1097: }
1098:
1099: if ($resource->getErrors()) {
1100: my $errors = $resource->getErrors();
1.254 matthew 1101: my $errorcount = 0;
1.394 raeburn 1102: foreach my $msgid (split(/,/, $errors)) {
1.254 matthew 1103: last if ($errorcount>=10); # Only output 10 bombs maximum
1.394 raeburn 1104: if ($msgid) {
1.254 matthew 1105: $errorcount++;
1.445 droeschl 1106: $errorHTML .= ' <a href="/adm/email?display='
1.394 raeburn 1107: . &escape($msgid) . '">'
1.442 wenzelju 1108: . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" title="'.&mt('New Error').'"/></a>';
1.134 bowersj2 1109: }
1110: }
1.197 bowersj2 1111: }
1112:
1113: if ($params->{'multipart'} && $part != '0') {
1114: $discussionHTML = $feedbackHTML = $errorHTML = '';
1.134 bowersj2 1115: }
1.426 droeschl 1116: return "<td class=\"LC_middle\">$discussionHTML$feedbackHTML$errorHTML </td>";
1.134 bowersj2 1117:
1.133 bowersj2 1118: }
1119: sub render_quick_status {
1120: my ($resource, $part, $params) = @_;
1.135 bowersj2 1121: my $result = "";
1122: my $firstDisplayed = !$params->{'condensed'} &&
1123: $params->{'multipart'} && $part eq "0";
1124:
1125: my $link = $params->{"resourceLink"};
1.445 droeschl 1126: my $linkopen = "<a href=\"$link\">";
1.135 bowersj2 1127: my $linkclose = "</a>";
1.426 droeschl 1128:
1129: $result .= '<td class="LC_middle">';
1.135 bowersj2 1130: if ($resource->is_problem() &&
1131: !$firstDisplayed) {
1.224 bowersj2 1132: my $icon = $statusIconMap{$resource->simpleStatus($part)};
1.135 bowersj2 1133: my $alt = $iconAltTags{$icon};
1134: if ($icon) {
1.298 albertel 1135: my $location=
1136: &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
1.438 wenzelju 1137: $result .= $linkopen.'<img src="'.$location.'" alt="'.&mt($alt).'" title="'.&mt($alt).'" />'.$linkclose;
1.135 bowersj2 1138: } else {
1.426 droeschl 1139: $result .= " ";
1.135 bowersj2 1140: }
1141: } else { # not problem, no icon
1.426 droeschl 1142: $result .= " ";
1.135 bowersj2 1143: }
1.426 droeschl 1144: $result .= "</td>\n";
1.135 bowersj2 1145: return $result;
1.133 bowersj2 1146: }
1147: sub render_long_status {
1148: my ($resource, $part, $params) = @_;
1.426 droeschl 1149: my $result = '<td class="LC_middle LC_right">';
1.136 bowersj2 1150: my $firstDisplayed = !$params->{'condensed'} &&
1151: $params->{'multipart'} && $part eq "0";
1152:
1153: my $color;
1.488 bisitz 1154: my $info = '';
1.402 albertel 1155: if ($resource->is_problem() || $resource->is_practice()) {
1.136 bowersj2 1156: $color = $colormap{$resource->status};
1.502 raeburn 1157:
1158: if (dueInLessThan24Hours($resource, $part)) {
1.136 bowersj2 1159: $color = $hurryUpColor;
1.488 bisitz 1160: $info = ' title="'.&mt('Due in less than 24 hours!').'"';
1.502 raeburn 1161: } elsif (lastTry($resource, $part)) {
1162: unless (($resource->problemstatus($part) eq 'no') ||
1163: ($resource->problemstatus($part) eq 'no_feedback_ever')) {
1164: $color = $hurryUpColor;
1165: $info = ' title="'.&mt('One try remaining!').'"';
1166: }
1167: }
1.136 bowersj2 1168: }
1169:
1.463 raeburn 1170: if ($resource->kind() eq "res" &&
1171: $resource->is_raw_problem() &&
1172: !$firstDisplayed) {
1.488 bisitz 1173: if ($color) {$result .= '<span style="color:'.$color.'"'.$info.'><b>'; }
1.136 bowersj2 1174: $result .= getDescription($resource, $part);
1.488 bisitz 1175: if ($color) {$result .= "</b></span>"; }
1.136 bowersj2 1176: }
1.402 albertel 1177: if ($resource->is_map() && &advancedUser() && $resource->randompick()) {
1.400 albertel 1178: $result .= &mt('(randomly select [_1])', $resource->randompick());
1179: }
1180: if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
1181: $result .= &mt('(randomly ordered)');
1.136 bowersj2 1182: }
1.210 bowersj2 1183:
1.213 bowersj2 1184: # Debugging code
1185: #$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
1186: # ' - Part: ' . $part;
1187:
1.210 bowersj2 1188: $result .= "</td>\n";
1.136 bowersj2 1189:
1190: return $result;
1.51 bowersj2 1191: }
1192:
1.227 bowersj2 1193: # Colors obtained by taking the icons, matching the colors, and
1194: # possibly reducing the Value (HSV) of the color, if it's too bright
1195: # for text, generally by one third or so.
1.225 bowersj2 1196: my %statusColors =
1197: (
1198: $resObj->CLOSED => '#000000',
1.227 bowersj2 1199: $resObj->OPEN => '#998b13',
1200: $resObj->CORRECT => '#26933f',
1201: $resObj->INCORRECT => '#c48207',
1202: $resObj->ATTEMPTED => '#a87510',
1.225 bowersj2 1203: $resObj->ERROR => '#000000'
1204: );
1205: my %statusStrings =
1206: (
1207: $resObj->CLOSED => 'Not yet open',
1208: $resObj->OPEN => 'Open',
1209: $resObj->CORRECT => 'Correct',
1210: $resObj->INCORRECT => 'Incorrect',
1211: $resObj->ATTEMPTED => 'Attempted',
1212: $resObj->ERROR => 'Network Error'
1213: );
1214: my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);
1215:
1216: sub render_parts_summary_status {
1217: my ($resource, $part, $params) = @_;
1.256 albertel 1218: if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
1.225 bowersj2 1219: if ($params->{showParts}) {
1220: return '<td></td>';
1221: }
1222:
1223: my $td = "<td align='right'>\n";
1224: my $endtd = "</td>\n";
1.256 albertel 1225: my @probs;
1.225 bowersj2 1226:
1.256 albertel 1227: if ($resource->contains_problem) {
1228: @probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
1229: } else {
1230: @probs=($resource);
1231: }
1232: my $return;
1233: my %overallstatus;
1234: my $totalParts;
1235: foreach my $resource (@probs) {
1236: # If there is a single part, just show the simple status
1237: if ($resource->singlepart()) {
1238: my $status = $resource->simpleStatus(${$resource->parts}[0]);
1239: $overallstatus{$status}++;
1240: $totalParts++;
1241: next;
1242: }
1243: # Now we can be sure the $part doesn't really matter.
1244: my $statusCount = $resource->simpleStatusCount();
1245: my @counts;
1246: foreach my $status (@statuses) {
1247: # decouple display order from the simpleStatusCount order
1248: my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
1249: if ($statusCount->[$slot]) {
1250: $overallstatus{$status}+=$statusCount->[$slot];
1251: $totalParts+=$statusCount->[$slot];
1252: }
1253: }
1254: }
1255: $return.= $td . $totalParts . ' parts: ';
1256: foreach my $status (@statuses) {
1.488 bisitz 1257: if ($overallstatus{$status}) {
1258: $return.='<span style="color:' . $statusColors{$status}
1259: . '">' . $overallstatus{$status} . ' '
1260: . $statusStrings{$status} . '</span>';
1261: }
1.225 bowersj2 1262: }
1.256 albertel 1263: $return.= $endtd;
1264: return $return;
1.225 bowersj2 1265: }
1266:
1.133 bowersj2 1267: my @preparedColumns = (\&render_resource, \&render_communication_status,
1.225 bowersj2 1268: \&render_quick_status, \&render_long_status,
1269: \&render_parts_summary_status);
1.132 bowersj2 1270:
1271: sub setDefault {
1272: my ($val, $default) = @_;
1273: if (!defined($val)) { return $default; }
1274: return $val;
1275: }
1276:
1.296 albertel 1277: sub cmp_title {
1278: my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
1279: $atitle=~s/^\s*//;
1280: $btitle=~s/^\s*//;
1281: return $atitle cmp $btitle;
1282: }
1283:
1.132 bowersj2 1284: sub render {
1285: my $args = shift;
1.140 bowersj2 1286: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
1287: my $result = '';
1.132 bowersj2 1288: # Configure the renderer.
1289: my $cols = $args->{'cols'};
1290: if (!defined($cols)) {
1291: # no columns, no nav maps.
1292: return '';
1293: }
1.140 bowersj2 1294: my $navmap;
1295: if (defined($args->{'navmap'})) {
1296: $navmap = $args->{'navmap'};
1297: }
1298:
1.158 bowersj2 1299: my $r = $args->{'r'};
1.140 bowersj2 1300: my $queryString = $args->{'queryString'};
1.159 bowersj2 1301: my $jump = $args->{'jump'};
1.158 bowersj2 1302: my $here = $args->{'here'};
1.153 bowersj2 1303: my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
1.256 albertel 1304: my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
1.140 bowersj2 1305: my $currentJumpDelta = 2; # change this to change how many resources are displayed
1306: # before the current resource when using #current
1307:
1308: # If we were passed 'here' information, we are not rendering
1309: # after a folder manipulation, and we were not passed an
1310: # iterator, make sure we open the folders to show the "here"
1311: # marker
1312: my $filterHash = {};
1313: # Figure out what we're not displaying
1.394 raeburn 1314: foreach my $item (split(/\,/, $env{"form.filter"})) {
1315: if ($item) {
1316: $filterHash->{$item} = "1";
1.140 bowersj2 1317: }
1318: }
1319:
1.191 bowersj2 1320: # Filter: Remember filter function and add our own filter: Refuse
1321: # to show hidden resources unless the user can see them.
1322: my $userCanSeeHidden = advancedUser();
1323: my $filterFunc = setDefault($args->{'filterFunc'},
1324: sub {return 1;});
1325: if (!$userCanSeeHidden) {
1326: # Without renaming the filterfunc, the server seems to go into
1327: # an infinite loop
1328: my $oldFilterFunc = $filterFunc;
1329: $filterFunc = sub { my $res = shift; return !$res->randomout() &&
1330: &$oldFilterFunc($res);};
1331: }
1332:
1.140 bowersj2 1333: my $condition = 0;
1.320 albertel 1334: if ($env{'form.condition'}) {
1.140 bowersj2 1335: $condition = 1;
1336: }
1337:
1.320 albertel 1338: if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
1.140 bowersj2 1339: # Step 1: Check to see if we have a navmap
1340: if (!defined($navmap)) {
1.221 bowersj2 1341: $navmap = Apache::lonnavmaps::navmap->new();
1.340 albertel 1342: if (!defined($navmap)) {
1.423 raeburn 1343: # no longer in course
1.388 albertel 1344: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1.362 www 1345: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1.340 albertel 1346: }
1347: }
1.140 bowersj2 1348:
1349: # Step two: Locate what kind of here marker is necessary
1350: # Determine where the "here" marker is and where the screen jumps to.
1351:
1.332 albertel 1352: if ($env{'form.postsymb'} ne '') {
1.320 albertel 1353: $here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
1.332 albertel 1354: } elsif ($env{'form.postdata'} ne '') {
1.140 bowersj2 1355: # couldn't find a symb, is there a URL?
1.320 albertel 1356: my $currenturl = $env{'form.postdata'};
1.158 bowersj2 1357: #$currenturl=~s/^http\:\/\///;
1358: #$currenturl=~s/^[^\/]+//;
1.140 bowersj2 1359:
1.158 bowersj2 1360: $here = $jump = &Apache::lonnet::symbread($currenturl);
1.331 albertel 1361: }
1362: if ($here eq '') {
1.317 albertel 1363: my $last;
1.320 albertel 1364: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
1.317 albertel 1365: &GDBM_READER(),0640)) {
1366: $last=$hash{'last_known'};
1367: untie(%hash);
1368: }
1369: if ($last) { $here = $jump = $last; }
1370: }
1.158 bowersj2 1371:
1.140 bowersj2 1372: # Step three: Ensure the folders are open
1373: my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
1.222 bowersj2 1374: my $curRes;
1.140 bowersj2 1375: my $found = 0;
1376:
1377: # We only need to do this if we need to open the maps to show the
1378: # current position. This will change the counter so we can't count
1379: # for the jump marker with this loop.
1.294 albertel 1380: while ($here && ($curRes = $mapIterator->next()) && !$found) {
1.158 bowersj2 1381: if (ref($curRes) && $curRes->symb() eq $here) {
1.140 bowersj2 1382: my $mapStack = $mapIterator->getStack();
1383:
1384: # Ensure the parent maps are open
1385: for my $map (@{$mapStack}) {
1386: if ($condition) {
1387: undef $filterHash->{$map->map_pc()};
1388: } else {
1389: $filterHash->{$map->map_pc()} = 1;
1390: }
1391: }
1392: $found = 1;
1393: }
1394: }
1.159 bowersj2 1395: }
1.140 bowersj2 1396:
1.320 albertel 1397: if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
1.140 bowersj2 1398: # If this is a click on a folder or something, we want to preserve the "here"
1399: # from the querystring, and get the new "jump" marker
1.320 albertel 1400: $here = $env{'form.here'};
1401: $jump = $env{'form.jump'};
1.140 bowersj2 1402: }
1403:
1.132 bowersj2 1404: my $it = $args->{'iterator'};
1405: if (!defined($it)) {
1.320 albertel 1406: # Construct a default iterator based on $env{'form.'} information
1.140 bowersj2 1407:
1408: # Step 1: Check to see if we have a navmap
1409: if (!defined($navmap)) {
1.221 bowersj2 1410: $navmap = Apache::lonnavmaps::navmap->new();
1.423 raeburn 1411: if (!defined($navmap)) {
1412: # no longer in course
1413: return '<span class="LC_error">'.&mt('No course selected').'</span><br />
1414: <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
1415: }
1.140 bowersj2 1416: }
1417:
1.144 bowersj2 1418: # See if we're being passed a specific map
1419: if ($args->{'iterator_map'}) {
1420: my $map = $args->{'iterator_map'};
1.145 bowersj2 1421: $map = $navmap->getResourceByUrl($map);
1.144 bowersj2 1422: my $firstResource = $map->map_start();
1423: my $finishResource = $map->map_finish();
1424:
1425: $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
1426: } else {
1.401 albertel 1427: $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
1.144 bowersj2 1428: }
1.132 bowersj2 1429: }
1.256 albertel 1430:
1.159 bowersj2 1431: # (re-)Locate the jump point, if any
1.191 bowersj2 1432: # Note this does not take filtering or hidden into account... need
1433: # to be fixed?
1.159 bowersj2 1434: my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
1.222 bowersj2 1435: my $curRes;
1.159 bowersj2 1436: my $foundJump = 0;
1437: my $counter = 0;
1438:
1.222 bowersj2 1439: while (($curRes = $mapIterator->next()) && !$foundJump) {
1.159 bowersj2 1440: if (ref($curRes)) { $counter++; }
1441:
1442: if (ref($curRes) && $jump eq $curRes->symb()) {
1443:
1444: # This is why we have to use the main iterator instead of the
1445: # potentially faster DFS: The count has to be the same, so
1446: # the order has to be the same, which DFS won't give us.
1447: $args->{'currentJumpIndex'} = $counter;
1448: $foundJump = 1;
1449: }
1450: }
1451:
1.132 bowersj2 1452: my $showParts = setDefault($args->{'showParts'}, 1);
1453: my $condenseParts = setDefault($args->{'condenseParts'}, 1);
1.139 bowersj2 1454: # keeps track of when the current resource is found,
1455: # so we can back up a few and put the anchor above the
1456: # current resource
1.140 bowersj2 1457: my $printKey = $args->{'printKey'};
1458: my $printCloseAll = $args->{'printCloseAll'};
1459: if (!defined($printCloseAll)) { $printCloseAll = 1; }
1.425 schulted 1460:
1.140 bowersj2 1461: # Print key?
1462: if ($printKey) {
1463: $result .= '<table border="0" cellpadding="2" cellspacing="0">';
1464: $result.='<tr><td align="right" valign="bottom">Key: </td>';
1.298 albertel 1465: my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
1.140 bowersj2 1466: if ($navmap->{LAST_CHECK}) {
1467: $result .=
1.434 bisitz 1468: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('New discussion since').' '.
1.140 bowersj2 1469: strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
1470: '</td><td align="center" valign="bottom"> '.
1.434 bisitz 1471: '<img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').'<p>'.
1.140 bowersj2 1472: '</td>';
1473: } else {
1474: $result .= '<td align="center" valign="bottom"> '.
1.434 bisitz 1475: '<img src="'.$location.'/chat.gif" alt="" /> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
1476: ' <img src="'.$location.'/feedback.gif" alt="" /> '.&mt('New message (click to open)').
1.140 bowersj2 1477: '</td>';
1478: }
1479:
1480: $result .= '</tr></table>';
1481: }
1482:
1.172 bowersj2 1483: if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
1.281 albertel 1484: my ($link,$text);
1.140 bowersj2 1485: if ($condition) {
1.446 raeburn 1486: $link='navmaps?condition=0&filter=&'.$queryString.
1.449 bisitz 1487: '&here='.&escape($here);
1.377 www 1488: $text='Close all folders';
1.140 bowersj2 1489: } else {
1.446 raeburn 1490: $link='navmaps?condition=1&filter=&'.$queryString.
1.449 bisitz 1491: '&here='.&escape($here);
1.377 www 1492: $text='Open all folders';
1.281 albertel 1493: }
1.446 raeburn 1494: if ($env{'form.register'}) {
1495: $link .= '&register='.$env{'form.register'};
1496: }
1.281 albertel 1497: if ($args->{'caller'} eq 'navmapsdisplay') {
1.478 raeburn 1498: unless ($args->{'notools'}) {
1499: &add_linkitem($args->{'linkitems'},'changefolder',
1500: "location.href='$link'",$text);
1501: }
1.281 albertel 1502: } else {
1.446 raeburn 1503: $result.= '<a href="'.$link.'">'.&mt($text).'</a>';
1.281 albertel 1504: }
1.266 raeburn 1505: $result .= "\n";
1506: }
1.140 bowersj2 1507:
1.266 raeburn 1508: # Check for any unread discussions in all resources.
1.478 raeburn 1509: if (($args->{'caller'} eq 'navmapsdisplay') && (!$args->{'notools'})) {
1.296 albertel 1510: &add_linkitem($args->{'linkitems'},'clearbubbles',
1511: 'document.clearbubbles.submit()',
1512: 'Mark all posts read');
1.297 albertel 1513: my $time=time;
1.486 raeburn 1514: my $querystr = &HTML::Entities::encode($ENV{'QUERY_STRING'},'<>&"');
1.296 albertel 1515: $result .= (<<END);
1516: <form name="clearbubbles" method="post" action="/adm/feedback">
1.486 raeburn 1517: <input type="hidden" name="navurl" value="$querystr" />
1.297 albertel 1518: <input type="hidden" name="navtime" value="$time" />
1.296 albertel 1519: END
1.446 raeburn 1520: if ($env{'form.register'}) {
1521: $result .= '<input type="hidden" name="register" value="'.$env{'form.register'}.'" />';
1522: }
1.296 albertel 1523: if ($args->{'sort'} eq 'discussion') {
1524: my $totdisc = 0;
1525: my $haveDisc = '';
1526: my @allres=$navmap->retrieveResources();
1527: foreach my $resource (@allres) {
1528: if ($resource->hasDiscussion()) {
1.323 albertel 1529: $haveDisc .= $resource->wrap_symb().':';
1.296 albertel 1530: $totdisc ++;
1.267 albertel 1531: }
1532: }
1.296 albertel 1533: if ($totdisc > 0) {
1534: $haveDisc =~ s/:$//;
1535: $result .= (<<END);
1536: <input type="hidden" name="navmaps" value="$haveDisc" />
1537: </form>
1538: END
1539: }
1.297 albertel 1540: }
1541: $result.='</form>';
1.478 raeburn 1542: }
1543: if (($args->{'caller'} eq 'navmapsdisplay') &&
1.525 raeburn 1544: ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
1545: (&Apache::lonnet::allowed('cev',$env{'request.course.id'})))) {
1.478 raeburn 1546: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1547: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1548: if ($env{'course.'.$env{'request.course.id'}.'.url'} eq
1549: "uploaded/$cdom/$cnum/default.sequence") {
1550: &add_linkitem($args->{'linkitems'},'edittoplevel',
1551: "javascript:gocmd('/adm/coursedocs','editdocs');",
1552: 'Content Editor');
1.475 raeburn 1553: }
1.266 raeburn 1554: }
1.276 albertel 1555:
1.281 albertel 1556: if ($args->{'caller'} eq 'navmapsdisplay') {
1.476 raeburn 1557: $result .= &show_linkitems_toolbar($args,$condition);
1.281 albertel 1558: } elsif ($args->{'sort_html'}) {
1559: $result.=$args->{'sort_html'};
1560: }
1.276 albertel 1561:
1.425 schulted 1562: #$result .= "<br />\n";
1.140 bowersj2 1563: if ($r) {
1564: $r->print($result);
1565: $r->rflush();
1566: $result = "";
1567: }
1.132 bowersj2 1568: # End parameter setting
1.425 schulted 1569:
1570: $result .= "<br />\n";
1571:
1.132 bowersj2 1572: # Data
1.431 schulted 1573: $result.=&Apache::loncommon::start_data_table("LC_tableOfContent");
1.426 droeschl 1574:
1.132 bowersj2 1575: my $res = "Apache::lonnavmaps::resource";
1576: my %condenseStatuses =
1577: ( $res->NETWORK_FAILURE => 1,
1578: $res->NOTHING_SET => 1,
1579: $res->CORRECT => 1 );
1.133 bowersj2 1580:
1581: # Shared variables
1582: $args->{'counter'} = 0; # counts the rows
1583: $args->{'indentLevel'} = 0;
1584: $args->{'isNewBranch'} = 0;
1.426 droeschl 1585: $args->{'condensed'} = 0;
1586:
1.428 droeschl 1587: my $location = &Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace_21.gif");
1.426 droeschl 1588: $args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' alt='' />");
1.133 bowersj2 1589: $args->{'displayedHereMarker'} = 0;
1.132 bowersj2 1590:
1.518 raeburn 1591: # If we're suppressing empty sequences, look for them here.
1592: # We also do this even if $args->{'suppressEmptySequences'}
1593: # is not true, so we can hide empty sequences for which the
1594: # hiddenresource parameter is set to yes (at map level), or
1595: # mark as hidden for users who have $userCanSeeHidden.
1596: # Use DFS for speed, since structure actually doesn't matter,
1597: # except what map has what resources.
1598:
1599: my $dfsit = Apache::lonnavmaps::DFSiterator->new($navmap,
1600: $it->{FIRST_RESOURCE},
1601: $it->{FINISH_RESOURCE},
1602: {}, undef, 1);
1603: my $depth = 0;
1604: $dfsit->next();
1605: my $curRes = $dfsit->next();
1606: while ($depth > -1) {
1607: if ($curRes == $dfsit->BEGIN_MAP()) { $depth++; }
1608: if ($curRes == $dfsit->END_MAP()) { $depth--; }
1609:
1610: if (ref($curRes)) {
1611: # Parallel pre-processing: Do sequences have non-filtered-out children?
1612: if ($curRes->is_map()) {
1613: $curRes->{DATA}->{HAS_VISIBLE_CHILDREN} = 0;
1614: # Sequences themselves do not count as visible children,
1615: # unless those sequences also have visible children.
1616: # This means if a sequence appears, there's a "promise"
1617: # that there's something under it if you open it, somewhere.
1618: } elsif ($curRes->src()) {
1619: # Not a sequence: if it's filtered, ignore it, otherwise
1620: # rise up the stack and mark the sequences as having children
1621: if (&$filterFunc($curRes)) {
1622: for my $sequence (@{$dfsit->getStack()}) {
1623: $sequence->{DATA}->{HAS_VISIBLE_CHILDREN} = 1;
1.190 bowersj2 1624: }
1625: }
1626: }
1627: }
1.518 raeburn 1628: } continue {
1629: $curRes = $dfsit->next();
1.190 bowersj2 1630: }
1631:
1.133 bowersj2 1632: my $displayedJumpMarker = 0;
1.132 bowersj2 1633: # Set up iteration.
1634: my $now = time();
1635: my $in24Hours = $now + 24 * 60 * 60;
1636: my $rownum = 0;
1637:
1.141 bowersj2 1638: # export "here" marker information
1639: $args->{'here'} = $here;
1640:
1.222 bowersj2 1641: $args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
1.270 albertel 1642: my @resources;
1643: my $code='';# sub { !(shift->is_map();) };
1644: if ($args->{'sort'} eq 'title') {
1.276 albertel 1645: my $oldFilterFunc = $filterFunc;
1646: my $filterFunc=
1647: sub {
1648: my ($res)=@_;
1649: if ($res->is_map()) { return 0;}
1650: return &$oldFilterFunc($res);
1651: };
1652: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.296 albertel 1653: @resources= sort { &cmp_title($a,$b) } @resources;
1654: } elsif ($args->{'sort'} eq 'duedate') {
1655: my $oldFilterFunc = $filterFunc;
1656: my $filterFunc=
1657: sub {
1658: my ($res)=@_;
1659: if (!$res->is_problem()) { return 0;}
1660: return &$oldFilterFunc($res);
1661: };
1662: @resources=$navmap->retrieveResources(undef,$filterFunc);
1.289 raeburn 1663: @resources= sort {
1.270 albertel 1664: if ($a->duedate ne $b->duedate) {
1665: return $a->duedate cmp $b->duedate;
1666: }
1.296 albertel 1667: my $value=&cmp_title($a,$b);
1668: return $value;
1.270 albertel 1669: } @resources;
1.296 albertel 1670: } elsif ($args->{'sort'} eq 'discussion') {
1671: my $oldFilterFunc = $filterFunc;
1672: my $filterFunc=
1673: sub {
1674: my ($res)=@_;
1675: if (!$res->hasDiscussion() &&
1676: !$res->getFeedback() &&
1677: !$res->getErrors()) { return 0;}
1678: return &$oldFilterFunc($res);
1679: };
1680: @resources=$navmap->retrieveResources(undef,$filterFunc);
1681: @resources= sort { &cmp_title($a,$b) } @resources;
1.276 albertel 1682: } else {
1683: #unknow sort mechanism or default
1684: undef($args->{'sort'});
1.270 albertel 1685: }
1686:
1.527 raeburn 1687: # Determine if page will be served with https in case
1688: # it contains a syllabus which uses an external URL
1689: # which points at an http site.
1690:
1.529 raeburn 1691: my ($is_ssl,$cdom,$cnum,$hostname);
1.527 raeburn 1692: if ($ENV{'SERVER_PORT'} == 443) {
1693: $is_ssl = 1;
1.530 ! raeburn 1694: if ($r) {
! 1695: $hostname = $r->hostname();
! 1696: } else {
! 1697: $hostname = $ENV{'SERVER_NAME'};
! 1698: }
1.527 raeburn 1699: }
1700: if ($env{'request.course.id'}) {
1701: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1702: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1703: }
1.276 albertel 1704:
1.270 albertel 1705: while (1) {
1706: if ($args->{'sort'}) {
1707: $curRes = shift(@resources);
1708: } else {
1709: $curRes = $it->next($closeAllPages);
1710: }
1711: if (!$curRes) { last; }
1712:
1.132 bowersj2 1713: # Maintain indentation level.
1714: if ($curRes == $it->BEGIN_MAP() ||
1715: $curRes == $it->BEGIN_BRANCH() ) {
1.133 bowersj2 1716: $args->{'indentLevel'}++;
1.132 bowersj2 1717: }
1718: if ($curRes == $it->END_MAP() ||
1719: $curRes == $it->END_BRANCH() ) {
1.133 bowersj2 1720: $args->{'indentLevel'}--;
1.132 bowersj2 1721: }
1722: # Notice new branches
1723: if ($curRes == $it->BEGIN_BRANCH()) {
1.133 bowersj2 1724: $args->{'isNewBranch'} = 1;
1725: }
1726:
1727: # If this isn't an actual resource, continue on
1728: if (!ref($curRes)) {
1729: next;
1.132 bowersj2 1730: }
1.133 bowersj2 1731:
1.143 bowersj2 1732: # If this has been filtered out, continue on
1733: if (!(&$filterFunc($curRes))) {
1734: $args->{'isNewBranch'} = 0; # Don't falsely remember this
1735: next;
1736: }
1.132 bowersj2 1737:
1.190 bowersj2 1738: # If this is an empty sequence and we're filtering them, continue on
1.518 raeburn 1739: $args->{'mapHidden'} = 0;
1740: if (($curRes->is_map()) && (!$curRes->{DATA}->{HAS_VISIBLE_CHILDREN})) {
1741: if ($args->{'suppressEmptySequences'}) {
1742: next;
1743: } else {
1744: my $mapname = &Apache::lonnet::declutter($curRes->src());
1745: $mapname = &Apache::lonnet::deversion($mapname);
1746: if (lc($navmap->get_mapparam(undef,$mapname,"0.hiddenresource")) eq 'yes') {
1747: if ($userCanSeeHidden) {
1748: $args->{'mapHidden'} = 1;
1749: } else {
1750: next;
1751: }
1752: }
1753: }
1.190 bowersj2 1754: }
1755:
1.153 bowersj2 1756: # If we're suppressing navmaps and this is a navmap, continue on
1757: if ($suppressNavmap && $curRes->src() =~ /^\/adm\/navmaps/) {
1758: next;
1759: }
1760:
1.191 bowersj2 1761: $args->{'counter'}++;
1762:
1.132 bowersj2 1763: # Does it have multiple parts?
1.133 bowersj2 1764: $args->{'multipart'} = 0;
1765: $args->{'condensed'} = 0;
1.132 bowersj2 1766: my @parts;
1767:
1768: # Decide what parts to show.
1.133 bowersj2 1769: if ($curRes->is_problem() && $showParts) {
1.132 bowersj2 1770: @parts = @{$curRes->parts()};
1.192 bowersj2 1771: $args->{'multipart'} = $curRes->multipart();
1.132 bowersj2 1772:
1773: if ($condenseParts) { # do the condensation
1.133 bowersj2 1774: if (!$args->{'condensed'}) {
1.132 bowersj2 1775: # Decide whether to condense based on similarity
1.192 bowersj2 1776: my $status = $curRes->status($parts[0]);
1777: my $due = $curRes->duedate($parts[0]);
1778: my $open = $curRes->opendate($parts[0]);
1.132 bowersj2 1779: my $statusAllSame = 1;
1780: my $dueAllSame = 1;
1781: my $openAllSame = 1;
1.192 bowersj2 1782: for (my $i = 1; $i < scalar(@parts); $i++) {
1.132 bowersj2 1783: if ($curRes->status($parts[$i]) != $status){
1784: $statusAllSame = 0;
1785: }
1786: if ($curRes->duedate($parts[$i]) != $due ) {
1787: $dueAllSame = 0;
1788: }
1789: if ($curRes->opendate($parts[$i]) != $open) {
1790: $openAllSame = 0;
1791: }
1792: }
1793: # $*allSame is true if all the statuses were
1794: # the same. Now, if they are all the same and
1795: # match one of the statuses to condense, or they
1796: # are all open with the same due date, or they are
1797: # all OPEN_LATER with the same open date, display the
1798: # status of the first non-zero part (to get the 'correct'
1799: # status right, since 0 is never 'correct' or 'open').
1800: if (($statusAllSame && defined($condenseStatuses{$status})) ||
1801: ($dueAllSame && $status == $curRes->OPEN && $statusAllSame)||
1802: ($openAllSame && $status == $curRes->OPEN_LATER && $statusAllSame) ){
1.192 bowersj2 1803: @parts = ($parts[0]);
1.133 bowersj2 1804: $args->{'condensed'} = 1;
1.132 bowersj2 1805: }
1806: }
1.198 bowersj2 1807: # Multipart problem with one part: always "condense" (happens
1808: # to match the desirable behavior)
1809: if ($curRes->countParts() == 1) {
1810: @parts = ($parts[0]);
1811: $args->{'condensed'} = 1;
1812: }
1.132 bowersj2 1813: }
1.157 bowersj2 1814: }
1.132 bowersj2 1815:
1816: # If the multipart problem was condensed, "forget" it was multipart
1817: if (scalar(@parts) == 1) {
1.133 bowersj2 1818: $args->{'multipart'} = 0;
1.192 bowersj2 1819: } else {
1820: # Add part 0 so we display it correctly.
1821: unshift @parts, '0';
1.132 bowersj2 1822: }
1.310 albertel 1823:
1824: {
1825: my ($src,$symb,$anchor,$stack);
1826: if ($args->{'sort'}) {
1827: my $it = $navmap->getIterator(undef, undef, undef, 1);
1828: while ( my $res=$it->next()) {
1829: if (ref($res) &&
1830: $res->symb() eq $curRes->symb()) { last; }
1831: }
1832: $stack=$it->getStack();
1833: } else {
1834: $stack=$it->getStack();
1835: }
1836: ($src,$symb,$anchor)=getLinkForResource($stack);
1.527 raeburn 1837: my $srcHasQuestion = $src =~ /\?/;
1838: if ($env{'request.course.id'}) {
1.529 raeburn 1839: if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
1.527 raeburn 1840: ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
1.528 raeburn 1841: if ($hostname ne '') {
1842: $src = 'http://'.$hostname.$src;
1843: }
1.527 raeburn 1844: $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
1845: $srcHasQuestion = 1;
1.529 raeburn 1846: } elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
1847: if ($hostname ne '') {
1848: $src = 'http://'.$hostname.$src;
1849: }
1.527 raeburn 1850: }
1851: }
1.310 albertel 1852: if (defined($anchor)) { $anchor='#'.$anchor; }
1853: $args->{"resourceLink"} = $src.
1.449 bisitz 1854: ($srcHasQuestion?'&':'?') .
1.384 www 1855: 'symb=' . &escape($symb).$anchor;
1.310 albertel 1856: }
1.132 bowersj2 1857: # Now, we've decided what parts to show. Loop through them and
1858: # show them.
1.192 bowersj2 1859: foreach my $part (@parts) {
1.132 bowersj2 1860: $rownum ++;
1861:
1.431 schulted 1862: $result .= &Apache::loncommon::start_data_table_row();
1.134 bowersj2 1863:
1864: # Set up some data about the parts that the cols might want
1865: my $filter = $it->{FILTER};
1.270 albertel 1866:
1.132 bowersj2 1867: # Now, display each column.
1868: foreach my $col (@$cols) {
1.139 bowersj2 1869: my $colHTML = '';
1870: if (ref($col)) {
1871: $colHTML .= &$col($curRes, $part, $args);
1872: } else {
1873: $colHTML .= &{$preparedColumns[$col]}($curRes, $part, $args);
1874: }
1.132 bowersj2 1875:
1.133 bowersj2 1876: # If this is the first column and it's time to print
1877: # the anchor, do so
1878: if ($col == $cols->[0] &&
1879: $args->{'counter'} == $args->{'currentJumpIndex'} -
1.139 bowersj2 1880: $currentJumpDelta) {
1881: # Jam the anchor after the <td> tag;
1882: # necessary for valid HTML (which Mozilla requires)
1883: $colHTML =~ s/\>/\>\<a name="curloc" \/\>/;
1.133 bowersj2 1884: $displayedJumpMarker = 1;
1885: }
1.139 bowersj2 1886: $result .= $colHTML . "\n";
1.132 bowersj2 1887: }
1.431 schulted 1888: $result .= &Apache::loncommon::end_data_table_row();
1.140 bowersj2 1889: $args->{'isNewBranch'} = 0;
1.139 bowersj2 1890: }
1.153 bowersj2 1891:
1.139 bowersj2 1892: if ($r && $rownum % 20 == 0) {
1893: $r->print($result);
1894: $result = "";
1895: $r->rflush();
1.132 bowersj2 1896: }
1.156 bowersj2 1897: } continue {
1.208 bowersj2 1898: if ($r) {
1899: # If we have the connection, make sure the user is still connected
1900: my $c = $r->connection;
1901: if ($c->aborted()) {
1902: # Who cares what we do, nobody will see it anyhow.
1903: return '';
1904: }
1905: }
1.132 bowersj2 1906: }
1.486 raeburn 1907:
1908: $result.=&Apache::loncommon::end_data_table();
1.132 bowersj2 1909:
1.134 bowersj2 1910: # Print out the part that jumps to #curloc if it exists
1.159 bowersj2 1911: # delay needed because the browser is processing the jump before
1912: # it finishes rendering, so it goes to the wrong place!
1913: # onload might be better, but this routine has no access to that.
1914: # On mozilla, the 0-millisecond timeout seems to prevent this;
1915: # it's quite likely this might fix other browsers, too, and
1916: # certainly won't hurt anything.
1.139 bowersj2 1917: if ($displayedJumpMarker) {
1.449 bisitz 1918: $result .= &Apache::lonhtmlcommon::scripttag("
1.247 albertel 1919: if (location.href.indexOf('#curloc')==-1) {
1920: setTimeout(\"location += '#curloc';\", 0)
1921: }
1.449 bisitz 1922: ");
1.134 bowersj2 1923: }
1924:
1.140 bowersj2 1925: if ($r) {
1926: $r->print($result);
1927: $result = "";
1928: $r->rflush();
1929: }
1930:
1.132 bowersj2 1931: return $result;
1932: }
1933:
1.281 albertel 1934: sub add_linkitem {
1935: my ($linkitems,$name,$cmd,$text)=@_;
1936: $$linkitems{$name}{'cmd'}=$cmd;
1937: $$linkitems{$name}{'text'}=&mt($text);
1938: }
1939:
1.430 schulted 1940: sub show_linkitems_toolbar {
1.476 raeburn 1941: my ($args,$condition) = @_;
1.478 raeburn 1942: my $result;
1.476 raeburn 1943: if (ref($args) eq 'HASH') {
1944: if (ref($args->{'linkitems'}) eq 'HASH') {
1.478 raeburn 1945: my $numlinks = scalar(keys(%{$args->{'linkitems'}}));
1946: if ($numlinks > 1) {
1947: $result = '<td>'.
1948: &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',
1949: undef,'RAT').
1950: '</td>'.
1951: '<td> </td>'.
1952: '<td class="LC_middle">'.&mt('Tools:').'</td>';
1953: }
1954: $result .= '<td align="left">'."\n".
1955: '<ul id="LC_toolbar">';
1.476 raeburn 1956: my @linkorder = ('firsthomework','everything','uncompleted',
1957: 'changefolder','clearbubbles','edittoplevel');
1958: foreach my $link (@linkorder) {
1959: if (ref($args->{'linkitems'}{$link}) eq 'HASH') {
1960: if ($args->{'linkitems'}{$link}{'text'} ne '') {
1961: $args->{'linkitems'}{$link}{'cmd'}=~s/"/'/g;
1962: if ($args->{'linkitems'}{$link}{'cmd'}) {
1.478 raeburn 1963: my $link_id = 'LC_content_toolbar_'.$link;
1.476 raeburn 1964: if ($link eq 'changefolder') {
1965: if ($condition) {
1966: $link_id='LC_content_toolbar_changefolder_toggled';
1967: } else {
1968: $link_id='LC_content_toolbar_changefolder';
1969: }
1970: }
1971: $result .= '<li><a href="#" '.
1972: 'onclick="'.$args->{'linkitems'}{$link}{'cmd'}.'" '.
1973: 'id="'.$link_id.'" '.
1974: 'class="LC_toolbarItem" '.
1975: 'title="'.$args->{'linkitems'}{$link}{'text'}.'">'.
1976: '</a></li>'."\n";
1.446 raeburn 1977: }
1978: }
1979: }
1980: }
1.476 raeburn 1981: $result .= '</ul>'.
1.486 raeburn 1982: '</td>';
1.478 raeburn 1983: if (($numlinks==1) && (exists($args->{'linkitems'}{'edittoplevel'}))) {
1984: $result .= '<td><a href="'.$args->{'linkitems'}{'edittoplevel'}{'cmd'}.'">'.
1985: &mt('Content Editor').'</a></td>';
1986: }
1.476 raeburn 1987: }
1988: if ($args->{'sort_html'}) {
1989: $result .= '<td> </td><td> </td><td> </td>'.
1990: '<td align="right">'.$args->{'sort_html'}.'</td>';
1.446 raeburn 1991: }
1.430 schulted 1992: }
1.478 raeburn 1993: if ($result) {
1994: $result = "<table><tr>$result</tr></table>";
1995: }
1.430 schulted 1996: return $result;
1997: }
1998:
1.133 bowersj2 1999: 1;
2000:
1.418 jms 2001:
2002:
2003:
2004:
2005:
2006:
2007:
2008:
1.133 bowersj2 2009: package Apache::lonnavmaps::navmap;
2010:
2011: =pod
2012:
1.216 bowersj2 2013: =head1 Object: Apache::lonnavmaps::navmap
1.133 bowersj2 2014:
1.217 bowersj2 2015: =head2 Overview
1.133 bowersj2 2016:
1.217 bowersj2 2017: The navmap object's job is to provide access to the resources
2018: in the course as Apache::lonnavmaps::resource objects, and to
2019: query and manage the relationship between those resource objects.
2020:
2021: Generally, you'll use the navmap object in one of three basic ways.
2022: In order of increasing complexity and power:
2023:
2024: =over 4
2025:
1.358 albertel 2026: =item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
1.217 bowersj2 2027: various ways to obtain resource objects, based on various identifiers.
2028: Use this when you want to request information about one object or
2029: a handful of resources you already know the identities of, from some
2030: other source. For more about Ids, Symbs, and MapPcs, see the
2031: Resource documentation. Note that Url should be a B<last resort>,
1.358 albertel 2032: not your first choice; it only really works when there is only one
1.217 bowersj2 2033: instance of the resource in the course, which only applies to
1.358 albertel 2034: maps, and even that may change in the future (see the B<getResourceByUrl>
2035: documentation for more details.)
1.217 bowersj2 2036:
2037: =item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
2038: retrieves resources matching some criterion and returns them
2039: in a flat array, with no structure information. Use this when
2040: you are manipulating a series of resources, based on what map
2041: the are in, but do not care about branching, or exactly how
2042: the maps and resources are related. This is the most common case.
2043:
2044: =item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
2045: the course's navmap in various ways without writing the traversal
2046: code yourself. See iterator documentation below. Use this when
2047: you need to know absolutely everything about the course, including
2048: branches and the precise relationship between maps and resources.
2049:
2050: =back
2051:
2052: =head2 Creation And Destruction
2053:
2054: To create a navmap object, use the following function:
1.133 bowersj2 2055:
2056: =over 4
2057:
1.221 bowersj2 2058: =item * B<Apache::lonnavmaps::navmap-E<gt>new>():
1.133 bowersj2 2059:
1.221 bowersj2 2060: Creates a new navmap object. Returns the navmap object if this is
2061: successful, or B<undef> if not.
1.174 albertel 2062:
1.216 bowersj2 2063: =back
2064:
2065: =head2 Methods
2066:
2067: =over 4
2068:
1.174 albertel 2069: =item * B<getIterator>(first, finish, filter, condition):
2070:
2071: See iterator documentation below.
1.133 bowersj2 2072:
2073: =cut
2074:
2075: use strict;
2076: use GDBM_File;
1.320 albertel 2077: use Apache::lonnet;
1.397 albertel 2078: use LONCAPA;
1.133 bowersj2 2079:
2080: sub new {
2081: # magic invocation to create a class instance
2082: my $proto = shift;
2083: my $class = ref($proto) || $proto;
2084: my $self = {};
1.501 raeburn 2085: bless($self); # So we can call change_user if necessary
1.133 bowersj2 2086:
1.453 www 2087: $self->{USERNAME} = shift || $env{'user.name'};
2088: $self->{DOMAIN} = shift || $env{'user.domain'};
1.491 raeburn 2089: $self->{CODE} = shift;
1.496 raeburn 2090: $self->{NOHIDE} = shift;
1.453 www 2091:
1.465 foxr 2092:
2093:
1.133 bowersj2 2094: # Resource cache stores navmap resources as we reference them. We generate
2095: # them on-demand so we don't pay for creating resources unless we use them.
2096: $self->{RESOURCE_CACHE} = {};
2097:
2098: # Network failure flag, if we accessed the course or user opt and
2099: # failed
2100: $self->{NETWORK_FAILURE} = 0;
2101:
1.465 foxr 2102: # We can only tie the nav hash as done below if the username/domain
2103: # match the env one. Otherwise change_user does everything we need...since we can't
1.501 raeburn 2104: # assume there are course hashes for the specific requested user:domain
2105: # Note: change_user is also called if we need the nav hash when printing CODEd
2106: # assignments or printing an exam, in which the enclosing folder for the items in
2107: # the exam has hidden set.
1.465 foxr 2108: #
1.133 bowersj2 2109:
1.501 raeburn 2110: if (($self->{USERNAME} eq $env{'user.name'}) && ($self->{DOMAIN} eq $env{'user.domain'}) &&
2111: !$self->{CODE} && !$self->{NOHIDE}) {
1.465 foxr 2112:
2113: # tie the nav hash
2114:
2115: my %navmaphash;
2116: my %parmhash;
2117: my $courseFn = $env{"request.course.fn"};
2118: if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
2119: &GDBM_READER(), 0640))) {
2120: return undef;
2121: }
2122:
2123: if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
2124: &GDBM_READER(), 0640)))
2125: {
2126: untie %{$self->{PARM_HASH}};
2127: return undef;
2128: }
2129:
2130: $self->{NAV_HASH} = \%navmaphash;
2131: $self->{PARM_HASH} = \%parmhash;
2132: $self->{PARM_CACHE} = {};
2133: } else {
1.496 raeburn 2134: $self->change_user($self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE});
1.133 bowersj2 2135: }
1.470 foxr 2136:
1.465 foxr 2137: return $self;
2138: }
2139:
2140: #
2141: # In some instances it is useful to be able to dynamically change the
2142: # username/domain associated with a navmap (e.g. to navigate for someone
2143: # else besides the current user...if sufficiently privileged.
2144: # Parameters:
2145: # user - New user.
2146: # domain- Domain the user belongs to.
1.491 raeburn 2147: # code - Anonymous CODE in use.
1.465 foxr 2148: # Implicit inputs:
2149: #
2150: sub change_user {
2151: my $self = shift;
2152: $self->{USERNAME} = shift;
2153: $self->{DOMAIN} = shift;
1.491 raeburn 2154: $self->{CODE} = shift;
1.496 raeburn 2155: $self->{NOHIDE} = shift;
1.465 foxr 2156:
2157: # If the hashes are already tied make sure to break that bond:
2158:
2159: untie %{$self->{NAV_HASH}};
2160: untie %{$self->{PARM_HASH}};
2161:
2162: # The assumption is that we have to
2163: # use lonmap here to re-read the hash and from it reconstruct
2164: # new big and parameter hashes. An implicit assumption at this time
2165: # is that the course file is probably not created locally yet
2166: # an that we will therefore just read without tying.
2167:
2168: my ($cdom, $cnum) = split(/\_/, $env{'request.course.id'});
2169:
2170: my %big_hash;
1.496 raeburn 2171: &Apache::lonmap::loadmap($cnum, $cdom, $self->{USERNAME}, $self->{DOMAIN}, $self->{CODE}, $self->{NOHIDE}, \%big_hash);
1.465 foxr 2172: $self->{NAV_HASH} = \%big_hash;
2173:
1.470 foxr 2174:
2175:
1.514 raeburn 2176: # Now clear the parm cache and reconstruct the parm hash from the big_hash
1.465 foxr 2177: # param.xxxx keys.
2178:
2179: $self->{PARM_CACHE} = {};
1.133 bowersj2 2180:
1.465 foxr 2181: my %parm_hash = {};
1.504 raeburn 2182: foreach my $key (keys(%big_hash)) {
1.465 foxr 2183: if ($key =~ /^param\./) {
2184: my $param_key = $key;
2185: $param_key =~ s/^param\.//;
2186: $parm_hash{$param_key} = $big_hash{$key};
2187: }
1.133 bowersj2 2188: }
2189:
1.465 foxr 2190: $self->{PARM_HASH} = \%parm_hash;
2191:
1.500 raeburn 2192: }
1.133 bowersj2 2193:
1.221 bowersj2 2194: sub generate_course_user_opt {
1.133 bowersj2 2195: my $self = shift;
1.221 bowersj2 2196: if ($self->{COURSE_USER_OPT_GENERATED}) { return; }
1.133 bowersj2 2197:
1.453 www 2198: my $uname=$self->{USERNAME};
2199: my $udom=$self->{DOMAIN};
2200:
1.320 albertel 2201: my $cid=$env{'request.course.id'};
1.326 albertel 2202: my $cdom=$env{'course.'.$cid.'.domain'};
2203: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2204:
1.133 bowersj2 2205: # ------------------------------------------------- Get coursedata (if present)
1.326 albertel 2206: my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
2207: # Check for network failure
2208: if (!ref($courseopt)) {
2209: if ( $courseopt =~ /no.such.host/i || $courseopt =~ /con_lost/i) {
1.324 albertel 2210: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2211: }
1.326 albertel 2212: undef($courseopt);
2213: }
1.325 albertel 2214:
1.133 bowersj2 2215: # --------------------------------------------------- Get userdata (if present)
1.325 albertel 2216:
1.326 albertel 2217: my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
2218: # Check for network failure
2219: if (!ref($useropt)) {
2220: if ( $useropt =~ /no.such.host/i || $useropt =~ /con_lost/i) {
1.324 albertel 2221: $self->{NETWORK_FAILURE} = 1;
1.221 bowersj2 2222: }
1.326 albertel 2223: undef($useropt);
1.221 bowersj2 2224: }
2225:
1.326 albertel 2226: $self->{COURSE_OPT} = $courseopt;
2227: $self->{USER_OPT} = $useropt;
2228:
1.221 bowersj2 2229: $self->{COURSE_USER_OPT_GENERATED} = 1;
2230:
2231: return;
2232: }
2233:
1.485 foxr 2234:
2235:
1.221 bowersj2 2236: sub generate_email_discuss_status {
2237: my $self = shift;
1.259 raeburn 2238: my $symb = shift;
1.221 bowersj2 2239: if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }
1.133 bowersj2 2240:
1.320 albertel 2241: my $cid=$env{'request.course.id'};
1.326 albertel 2242: my $cdom=$env{'course.'.$cid.'.domain'};
2243: my $cnum=$env{'course.'.$cid.'.num'};
1.221 bowersj2 2244:
1.454 www 2245: my %emailstatus = &Apache::lonnet::dump('email_status',$self->{DOMAIN},$self->{USERNAME});
1.221 bowersj2 2246: my $logoutTime = $emailstatus{'logout'};
1.320 albertel 2247: my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
1.221 bowersj2 2248: $self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
2249: $courseLeaveTime : $logoutTime);
2250: my %discussiontime = &Apache::lonnet::dump('discussiontimes',
2251: $cdom, $cnum);
1.259 raeburn 2252: my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
1.453 www 2253: $self->{DOMAIN},$self->{USERNAME},'lastread');
1.259 raeburn 2254: my %lastreadtime = ();
1.504 raeburn 2255: foreach my $key (keys(%lastread)) {
1.394 raeburn 2256: my $shortkey = $key;
2257: $shortkey =~ s/_lastread$//;
2258: $lastreadtime{$shortkey} = $lastread{$key};
1.259 raeburn 2259: }
2260:
1.221 bowersj2 2261: my %feedback=();
2262: my %error=();
1.453 www 2263: my @keys = &Apache::lonnet::getkeys('nohist_email',$self->{DOMAIN},
2264: $self->{USERNAME});
1.221 bowersj2 2265:
1.325 albertel 2266: foreach my $msgid (@keys) {
1.295 albertel 2267: if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
1.395 raeburn 2268: my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
2269: $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
1.396 raeburn 2270: &Apache::lonenc::check_decrypt(\$symb);
2271: if (($fromcid ne '') && ($fromcid ne $cid)) {
2272: next;
2273: }
1.395 raeburn 2274: if (defined($symb)) {
2275: if (defined($error) && $error == 1) {
2276: $error{$symb}.=','.$msgid;
2277: } else {
2278: $feedback{$symb}.=','.$msgid;
2279: }
2280: } else {
2281: my $plain=
2282: &LONCAPA::unescape(&LONCAPA::unescape($msgid));
2283: if ($plain=~/ \[([^\]]+)\]\:/) {
2284: my $url=$1;
2285: if ($plain=~/\:Error \[/) {
2286: $error{$url}.=','.$msgid;
2287: } else {
2288: $feedback{$url}.=','.$msgid;
2289: }
2290: }
2291: }
1.221 bowersj2 2292: }
1.211 bowersj2 2293: }
1.221 bowersj2 2294:
1.395 raeburn 2295: #symbs of resources that have feedbacks (will be urls pre-2.3)
1.221 bowersj2 2296: $self->{FEEDBACK} = \%feedback;
1.395 raeburn 2297: #or errors (will be urls pre 2.3)
1.295 albertel 2298: $self->{ERROR_MSG} = \%error;
1.221 bowersj2 2299: $self->{DISCUSSION_TIME} = \%discussiontime;
2300: $self->{EMAIL_STATUS} = \%emailstatus;
1.259 raeburn 2301: $self->{LAST_READ} = \%lastreadtime;
1.221 bowersj2 2302:
2303: $self->{EMAIL_DISCUSS_GENERATED} = 1;
2304: }
2305:
2306: sub get_user_data {
2307: my $self = shift;
2308: if ($self->{RETRIEVED_USER_DATA}) { return; }
1.211 bowersj2 2309:
1.221 bowersj2 2310: # Retrieve performance data on problems
1.320 albertel 2311: my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
1.453 www 2312: $self->{DOMAIN},
2313: $self->{USERNAME});
1.221 bowersj2 2314: $self->{STUDENT_DATA} = \%student_data;
1.133 bowersj2 2315:
1.221 bowersj2 2316: $self->{RETRIEVED_USER_DATA} = 1;
1.133 bowersj2 2317: }
2318:
1.354 raeburn 2319: sub get_discussion_data {
2320: my $self = shift;
2321: if ($self->{RETRIEVED_DISCUSSION_DATA}) {
1.366 albertel 2322: return $self->{DISCUSSION_DATA};
1.354 raeburn 2323: }
1.366 albertel 2324:
2325: $self->generate_email_discuss_status();
2326:
1.354 raeburn 2327: my $cid=$env{'request.course.id'};
2328: my $cdom=$env{'course.'.$cid.'.domain'};
2329: my $cnum=$env{'course.'.$cid.'.num'};
2330: # Retrieve discussion data for resources in course
1.367 albertel 2331: my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);
1.366 albertel 2332:
2333:
1.354 raeburn 2334: $self->{DISCUSSION_DATA} = \%discussion_data;
2335: $self->{RETRIEVED_DISCUSSION_DATA} = 1;
2336: return $self->{DISCUSSION_DATA};
2337: }
2338:
2339:
1.133 bowersj2 2340: # Internal function: Takes a key to look up in the nav hash and implements internal
2341: # memory caching of that key.
2342: sub navhash {
2343: my $self = shift; my $key = shift;
2344: return $self->{NAV_HASH}->{$key};
2345: }
2346:
1.217 bowersj2 2347: =pod
2348:
2349: =item * B<courseMapDefined>(): Returns true if the course map is defined,
2350: false otherwise. Undefined course maps indicate an error somewhere in
2351: LON-CAPA, and you will not be able to proceed with using the navmap.
2352: See the B<NAV> screen for an example of using this.
2353:
2354: =cut
2355:
1.133 bowersj2 2356: # Checks to see if coursemap is defined, matching test in old lonnavmaps
2357: sub courseMapDefined {
2358: my $self = shift;
1.320 albertel 2359: my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});
1.133 bowersj2 2360:
2361: my $firstres = $self->navhash("map_start_$uri");
2362: my $lastres = $self->navhash("map_finish_$uri");
2363: return $firstres && $lastres;
2364: }
2365:
2366: sub getIterator {
2367: my $self = shift;
2368: my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
1.314 albertel 2369: shift, undef, shift,
2370: shift, shift);
1.133 bowersj2 2371: return $iterator;
2372: }
2373:
2374: # Private method: Does the given resource (as a symb string) have
2375: # current discussion? Returns 0 if chat/mail data not extracted.
2376: sub hasDiscussion {
2377: my $self = shift;
2378: my $symb = shift;
1.221 bowersj2 2379: $self->generate_email_discuss_status();
2380:
1.133 bowersj2 2381: if (!defined($self->{DISCUSSION_TIME})) { return 0; }
2382:
2383: #return defined($self->{DISCUSSION_TIME}->{$symb});
1.259 raeburn 2384:
1.323 albertel 2385: # backward compatibility (bulletin boards used to be 'wrapped')
2386: my $ressymb = $self->wrap_symb($symb);
1.259 raeburn 2387: if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
2388: return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
2389: } else {
1.266 raeburn 2390: # return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
2391: return $self->{DISCUSSION_TIME}->{$ressymb} > 0; # in 1.2 will display speech bubble icons for all items with posts until marked as read (even if read in v 1.1).
1.259 raeburn 2392: }
1.133 bowersj2 2393: }
2394:
1.366 albertel 2395: sub last_post_time {
2396: my $self = shift;
2397: my $symb = shift;
2398: my $ressymb = $self->wrap_symb($symb);
2399: return $self->{DISCUSSION_TIME}->{$ressymb};
2400: }
2401:
1.393 raeburn 2402: sub discussion_info {
1.366 albertel 2403: my $self = shift;
2404: my $symb = shift;
1.393 raeburn 2405: my $filter = shift;
1.366 albertel 2406:
2407: $self->get_discussion_data();
1.372 raeburn 2408:
1.366 albertel 2409: my $ressymb = $self->wrap_symb($symb);
1.372 raeburn 2410: # keys used to store bulletinboard postings use 'unwrapped' symb.
1.397 albertel 2411: my $discsymb = &escape($self->unwrap_symb($ressymb));
1.372 raeburn 2412: my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
1.366 albertel 2413: if (!$version) { return; }
2414:
2415: my $prevread = $self->{LAST_READ}{$ressymb};
2416:
1.393 raeburn 2417: my $count = 0;
1.366 albertel 2418: my $hiddenflag = 0;
2419: my $deletedflag = 0;
1.393 raeburn 2420: my ($hidden,$deleted,%info);
1.366 albertel 2421:
2422: for (my $id=$version; $id>0; $id--) {
1.372 raeburn 2423: my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
1.366 albertel 2424: my @keys=split(/:/,$vkeys);
2425: if (grep(/^hidden$/ ,@keys)) {
2426: if (!$hiddenflag) {
1.372 raeburn 2427: $hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
1.366 albertel 2428: $hiddenflag = 1;
2429: }
2430: } elsif (grep(/^deleted$/,@keys)) {
2431: if (!$deletedflag) {
1.372 raeburn 2432: $deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
1.366 albertel 2433: $deletedflag = 1;
2434: }
2435: } else {
1.393 raeburn 2436: if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
2437: if ($filter eq 'unread') {
2438: if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
2439: next;
2440: }
2441: }
2442: $count++;
2443: $info{$count}{'subject'} =
2444: $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
2445: $info{$count}{'id'} = $id;
2446: $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
2447: }
1.366 albertel 2448: }
2449: }
2450: if (wantarray) {
1.393 raeburn 2451: return ($count,%info);
1.366 albertel 2452: }
1.393 raeburn 2453: return $count;
1.366 albertel 2454: }
2455:
1.321 raeburn 2456: sub wrap_symb {
1.322 albertel 2457: my $self = shift;
1.321 raeburn 2458: my $symb = shift;
1.373 albertel 2459: if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
1.322 albertel 2460: unless ($symb =~ m|adm/wrapper/adm|) {
2461: $symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
1.321 raeburn 2462: }
2463: }
1.322 albertel 2464: return $symb;
1.321 raeburn 2465: }
2466:
1.372 raeburn 2467: sub unwrap_symb {
2468: my $self = shift;
2469: my $ressymb = shift;
2470: my $discsymb = $ressymb;
1.373 albertel 2471: if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
1.372 raeburn 2472: $discsymb = $1.$2;
2473: }
2474: return $discsymb;
2475: }
2476:
1.322 albertel 2477: # Private method: Does the given resource (as a symb string) have
2478: # current feedback? Returns the string in the feedback hash, which
2479: # will be false if it does not exist.
2480:
1.133 bowersj2 2481: sub getFeedback {
2482: my $self = shift;
2483: my $symb = shift;
1.395 raeburn 2484: my $source = shift;
1.133 bowersj2 2485:
1.221 bowersj2 2486: $self->generate_email_discuss_status();
2487:
1.133 bowersj2 2488: if (!defined($self->{FEEDBACK})) { return ""; }
2489:
1.395 raeburn 2490: my $feedback;
2491: if ($self->{FEEDBACK}->{$symb}) {
2492: $feedback = $self->{FEEDBACK}->{$symb};
2493: if ($self->{FEEDBACK}->{$source}) {
2494: $feedback .= ','.$self->{FEEDBACK}->{$source};
2495: }
2496: } else {
2497: if ($self->{FEEDBACK}->{$source}) {
2498: $feedback = $self->{FEEDBACK}->{$source};
2499: }
2500: }
2501: return $feedback;
1.133 bowersj2 2502: }
2503:
2504: # Private method: Get the errors for that resource (by source).
2505: sub getErrors {
2506: my $self = shift;
1.395 raeburn 2507: my $symb = shift;
1.133 bowersj2 2508: my $src = shift;
1.221 bowersj2 2509:
2510: $self->generate_email_discuss_status();
2511:
1.133 bowersj2 2512: if (!defined($self->{ERROR_MSG})) { return ""; }
1.395 raeburn 2513:
2514: my $errors;
2515: if ($self->{ERROR_MSG}->{$symb}) {
2516: $errors = $self->{ERROR_MSG}->{$symb};
2517: if ($self->{ERROR_MSG}->{$src}) {
2518: $errors .= ','.$self->{ERROR_MSG}->{$src};
2519: }
2520: } else {
2521: if ($self->{ERROR_MSG}->{$src}) {
2522: $errors = $self->{ERROR_MSG}->{$src};
2523: }
2524: }
2525: return $errors;
1.133 bowersj2 2526: }
2527:
2528: =pod
2529:
1.174 albertel 2530: =item * B<getById>(id):
2531:
2532: Based on the ID of the resource (1.1, 3.2, etc.), get a resource
2533: object for that resource. This method, or other methods that use it
2534: (as in the resource object) is the only proper way to obtain a
2535: resource object.
1.133 bowersj2 2536:
1.194 bowersj2 2537: =item * B<getBySymb>(symb):
2538:
2539: Based on the symb of the resource, get a resource object for that
2540: resource. This is one of the proper ways to get a resource object.
2541:
1.448 raeburn 2542: =item * B<getByMapPc>(map_pc):
1.194 bowersj2 2543:
2544: Based on the map_pc of the resource, get a resource object for
2545: the given map. This is one of the proper ways to get a resource object.
2546:
1.133 bowersj2 2547: =cut
2548:
2549: # The strategy here is to cache the resource objects, and only construct them
2550: # as we use them. The real point is to prevent reading any more from the tied
1.398 banghart 2551: # hash than we have to, which should hopefully alleviate speed problems.
1.133 bowersj2 2552:
2553: sub getById {
2554: my $self = shift;
2555: my $id = shift;
2556:
2557: if (defined ($self->{RESOURCE_CACHE}->{$id}))
2558: {
2559: return $self->{RESOURCE_CACHE}->{$id};
2560: }
2561:
2562: # resource handles inserting itself into cache.
2563: # Not clear why the quotes are necessary, but as of this
2564: # writing it doesn't work without them.
2565: return "Apache::lonnavmaps::resource"->new($self, $id);
1.132 bowersj2 2566: }
1.133 bowersj2 2567:
1.172 bowersj2 2568: sub getBySymb {
2569: my $self = shift;
2570: my $symb = shift;
1.277 matthew 2571:
1.228 albertel 2572: my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
1.172 bowersj2 2573: my $map = $self->getResourceByUrl($mapUrl);
1.277 matthew 2574: my $returnvalue = undef;
2575: if (ref($map)) {
2576: $returnvalue = $self->getById($map->map_pc() .'.'.$id);
2577: }
2578: return $returnvalue;
1.194 bowersj2 2579: }
2580:
2581: sub getByMapPc {
2582: my $self = shift;
2583: my $map_pc = shift;
2584: my $map_id = $self->{NAV_HASH}->{'map_id_' . $map_pc};
2585: $map_id = $self->{NAV_HASH}->{'ids_' . $map_id};
2586: return $self->getById($map_id);
1.172 bowersj2 2587: }
2588:
1.133 bowersj2 2589: =pod
2590:
1.174 albertel 2591: =item * B<firstResource>():
2592:
2593: Returns a resource object reference corresponding to the first
2594: resource in the navmap.
1.133 bowersj2 2595:
2596: =cut
2597:
2598: sub firstResource {
2599: my $self = shift;
2600: my $firstResource = $self->navhash('map_start_' .
1.320 albertel 2601: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2602: return $self->getById($firstResource);
1.132 bowersj2 2603: }
1.133 bowersj2 2604:
2605: =pod
2606:
1.174 albertel 2607: =item * B<finishResource>():
2608:
2609: Returns a resource object reference corresponding to the last resource
2610: in the navmap.
1.133 bowersj2 2611:
2612: =cut
2613:
2614: sub finishResource {
2615: my $self = shift;
2616: my $firstResource = $self->navhash('map_finish_' .
1.320 albertel 2617: &Apache::lonnet::clutter($env{'request.course.uri'}));
1.133 bowersj2 2618: return $self->getById($firstResource);
1.132 bowersj2 2619: }
1.133 bowersj2 2620:
2621: # Parmval reads the parm hash and cascades the lookups. parmval_real does
2622: # the actual lookup; parmval caches the results.
2623: sub parmval {
2624: my $self = shift;
1.399 albertel 2625: my ($what,$symb,$recurse)=@_;
1.133 bowersj2 2626: my $hashkey = $what."|||".$symb;
1.459 foxr 2627: my $cache = $self->{PARM_CACHE};
1.133 bowersj2 2628: if (defined($self->{PARM_CACHE}->{$hashkey})) {
1.411 raeburn 2629: if (ref($self->{PARM_CACHE}->{$hashkey}) eq 'ARRAY') {
2630: if (defined($self->{PARM_CACHE}->{$hashkey}->[0])) {
2631: if (wantarray) {
2632: return @{$self->{PARM_CACHE}->{$hashkey}};
2633: } else {
2634: return $self->{PARM_CACHE}->{$hashkey}->[0];
2635: }
2636: }
2637: } else {
2638: return $self->{PARM_CACHE}->{$hashkey};
2639: }
1.133 bowersj2 2640: }
1.515 raeburn 2641:
1.399 albertel 2642: my $result = $self->parmval_real($what, $symb, $recurse);
1.133 bowersj2 2643: $self->{PARM_CACHE}->{$hashkey} = $result;
1.405 albertel 2644: if (wantarray) {
1.411 raeburn 2645: return @{$result};
1.405 albertel 2646: }
2647: return $result->[0];
1.132 bowersj2 2648: }
2649:
1.485 foxr 2650:
1.133 bowersj2 2651: sub parmval_real {
2652: my $self = shift;
1.219 albertel 2653: my ($what,$symb,$recurse) = @_;
1.133 bowersj2 2654:
1.485 foxr 2655:
1.221 bowersj2 2656: # Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
2657: $self->generate_course_user_opt();
2658:
1.320 albertel 2659: my $cid=$env{'request.course.id'};
2660: my $csec=$env{'request.course.sec'};
1.350 raeburn 2661: my $cgroup='';
2662: my @cgrps=split(/:/,$env{'request.course.groups'});
2663: if (@cgrps > 0) {
2664: @cgrps = sort(@cgrps);
2665: $cgroup = $cgrps[0];
2666: }
1.453 www 2667: my $uname=$self->{USERNAME};
2668: my $udom=$self->{DOMAIN};
1.133 bowersj2 2669:
1.405 albertel 2670: unless ($symb) { return ['']; }
1.133 bowersj2 2671: my $result='';
2672:
1.226 www 2673: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
1.383 albertel 2674: $mapname = &Apache::lonnet::deversion($mapname);
1.515 raeburn 2675: my ($recursed,@recurseup);
2676:
1.133 bowersj2 2677: # ----------------------------------------------------- Cascading lookup scheme
2678: my $rwhat=$what;
2679: $what=~s/^parameter\_//;
2680: $what=~s/\_/\./;
2681:
2682: my $symbparm=$symb.'.'.$what;
1.515 raeburn 2683: my $recurseparm=$mapname.'___(rec).'.$what;
1.133 bowersj2 2684: my $mapparm=$mapname.'___(all).'.$what;
1.325 albertel 2685: my $usercourseprefix=$cid;
1.515 raeburn 2686:
1.485 foxr 2687:
2688:
1.350 raeburn 2689: my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
2690: my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
1.515 raeburn 2691: my $grpleveli=$usercourseprefix.'.['.$cgroup.'].'.$recurseparm;
1.350 raeburn 2692: my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;
2693:
1.485 foxr 2694:
1.133 bowersj2 2695: my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
2696: my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
1.515 raeburn 2697: my $secleveli=$usercourseprefix.'.['.$csec.'].'.$recurseparm;
1.133 bowersj2 2698: my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;
2699:
1.485 foxr 2700:
1.133 bowersj2 2701: my $courselevel= $usercourseprefix.'.'.$what;
2702: my $courselevelr=$usercourseprefix.'.'.$symbparm;
1.515 raeburn 2703: my $courseleveli=$usercourseprefix.'.'.$recurseparm;
1.133 bowersj2 2704: my $courselevelm=$usercourseprefix.'.'.$mapparm;
2705:
1.485 foxr 2706:
1.133 bowersj2 2707: my $useropt = $self->{USER_OPT};
2708: my $courseopt = $self->{COURSE_OPT};
2709: my $parmhash = $self->{PARM_HASH};
2710:
2711: # ---------------------------------------------------------- first, check user
2712: if ($uname and defined($useropt)) {
1.405 albertel 2713: if (defined($$useropt{$courselevelr})) { return [$$useropt{$courselevelr},'resource']; }
2714: if (defined($$useropt{$courselevelm})) { return [$$useropt{$courselevelm},'map']; }
1.515 raeburn 2715: if (defined($$useropt{$courseleveli})) { return [$$useropt{$courseleveli},'map']; }
2716: unless ($recursed) {
2717: @recurseup = $self->recurseup_maps($mapname);
2718: $recursed = 1;
2719: }
2720: foreach my $item (@recurseup) {
2721: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
1.526 raeburn 2722: if (defined($$useropt{$norecursechk})) {
2723: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2724: return [$$useropt{$norecursechk},'map'];
2725: } else {
2726: last;
2727: }
2728: }
1.515 raeburn 2729: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2730: if (defined($$useropt{$recursechk})) { return [$$useropt{$recursechk},'map']; }
2731: }
1.405 albertel 2732: if (defined($$useropt{$courselevel})) { return [$$useropt{$courselevel},'course']; }
1.133 bowersj2 2733: }
2734:
2735: # ------------------------------------------------------- second, check course
1.350 raeburn 2736: if ($cgroup ne '' and defined($courseopt)) {
1.405 albertel 2737: if (defined($$courseopt{$grplevelr})) { return [$$courseopt{$grplevelr},'resource']; }
2738: if (defined($$courseopt{$grplevelm})) { return [$$courseopt{$grplevelm},'map']; }
1.515 raeburn 2739: if (defined($$courseopt{$grpleveli})) { return [$$courseopt{$grpleveli},'map']; }
2740: unless ($recursed) {
2741: @recurseup = $self->recurseup_maps($mapname);
2742: $recursed = 1;
2743: }
2744: foreach my $item (@recurseup) {
2745: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
1.526 raeburn 2746: if (defined($$courseopt{$norecursechk})) {
2747: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2748: return [$$courseopt{$norecursechk},'map'];
2749: } else {
2750: last;
2751: }
2752: }
1.515 raeburn 2753: my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
2754: if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
2755: }
1.405 albertel 2756: if (defined($$courseopt{$grplevel})) { return [$$courseopt{$grplevel},'course']; }
1.350 raeburn 2757: }
2758:
1.515 raeburn 2759: if ($csec ne '' and defined($courseopt)) {
1.405 albertel 2760: if (defined($$courseopt{$seclevelr})) { return [$$courseopt{$seclevelr},'resource']; }
2761: if (defined($$courseopt{$seclevelm})) { return [$$courseopt{$seclevelm},'map']; }
1.515 raeburn 2762: if (defined($$courseopt{$secleveli})) { return [$$courseopt{$secleveli},'map']; }
2763: unless ($recursed) {
2764: @recurseup = $self->recurseup_maps($mapname);
2765: $recursed = 1;
2766: }
2767: foreach my $item (@recurseup) {
2768: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
1.526 raeburn 2769: if (defined($$courseopt{$norecursechk})) {
2770: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2771: return [$$courseopt{$norecursechk},'map'];
2772: } else {
2773: last;
2774: }
2775: }
1.515 raeburn 2776: my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
2777: if (defined($$courseopt{$recursechk})) { return [$$courseopt{$recursechk},'map']; }
2778: }
1.405 albertel 2779: if (defined($$courseopt{$seclevel})) { return [$$courseopt{$seclevel},'course']; }
1.133 bowersj2 2780: }
2781:
2782: if (defined($courseopt)) {
1.405 albertel 2783: if (defined($$courseopt{$courselevelr})) { return [$$courseopt{$courselevelr},'resource']; }
1.133 bowersj2 2784: }
2785:
2786: # ----------------------------------------------------- third, check map parms
2787:
2788: my $thisparm=$$parmhash{$symbparm};
1.405 albertel 2789: if (defined($thisparm)) { return [$thisparm,'map']; }
1.133 bowersj2 2790:
2791: # ----------------------------------------------------- fourth , check default
2792:
1.246 albertel 2793: my $meta_rwhat=$rwhat;
2794: $meta_rwhat=~s/\./_/g;
2795: my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
1.405 albertel 2796: if (defined($default)) { return [$default,'resource']}
1.246 albertel 2797: $default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
1.405 albertel 2798: if (defined($default)) { return [$default,'resource']}
1.315 albertel 2799: # --------------------------------------------------- fifth, check more course
2800: if (defined($courseopt)) {
1.405 albertel 2801: if (defined($$courseopt{$courselevelm})) { return [$$courseopt{$courselevelm},'map']; }
1.515 raeburn 2802: if (defined($$courseopt{$courseleveli})) { return [$$courseopt{$courseleveli},'map']; }
2803: unless ($recursed) {
2804: @recurseup = $self->recurseup_maps($mapname);
2805: $recursed = 1;
2806: }
2807: foreach my $item (@recurseup) {
2808: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
1.526 raeburn 2809: if (defined($$courseopt{$norecursechk})) {
2810: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2811: return [$$courseopt{$norecursechk},'map'];
2812: } else {
2813: last;
2814: }
2815: }
1.515 raeburn 2816: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2817: if (defined($$courseopt{$recursechk})) {
2818: return [$$courseopt{$recursechk},'map'];
2819: }
2820: }
1.405 albertel 2821: if (defined($$courseopt{$courselevel})) {
2822: my $ret = [$$courseopt{$courselevel},'course'];
2823: return $ret;
2824: }
1.315 albertel 2825: }
2826: # --------------------------------------------------- sixth , cascade up parts
1.133 bowersj2 2827:
2828: my ($space,@qualifier)=split(/\./,$rwhat);
2829: my $qualifier=join('.',@qualifier);
2830: unless ($space eq '0') {
1.160 albertel 2831: my @parts=split(/_/,$space);
2832: my $id=pop(@parts);
2833: my $part=join('_',@parts);
2834: if ($part eq '') { $part='0'; }
1.405 albertel 2835: my @partgeneral=$self->parmval($part.".$qualifier",$symb,1);
2836: if (defined($partgeneral[0])) { return \@partgeneral; }
1.133 bowersj2 2837: }
1.405 albertel 2838: if ($recurse) { return []; }
1.399 albertel 2839: my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
1.405 albertel 2840: if (defined($pack_def)) { return [$pack_def,'resource']; }
2841: return [''];
1.145 bowersj2 2842: }
1.515 raeburn 2843:
2844: sub recurseup_maps {
2845: my ($self,$mapname) = @_;
2846: my @recurseup;
1.517 raeburn 2847: if ($mapname) {
1.519 raeburn 2848: my $res = $self->getResourceByUrl($mapname);
2849: if (ref($res)) {
2850: my @pcs = split(/,/,$res->map_hierarchy());
2851: shift(@pcs);
2852: if (@pcs) {
2853: @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
2854: }
1.517 raeburn 2855: }
1.515 raeburn 2856: }
2857: return @recurseup;
2858: }
2859:
1.485 foxr 2860: #
2861: # Determines the open/close dates for printing a map that
2862: # encloses a resource.
2863: #
2864: sub map_printdates {
2865: my ($self, $res, $part) = @_;
2866:
2867:
2868:
2869:
2870:
1.518 raeburn 2871: my $opendate = $self->get_mapparam($res->symb(),'',"$part.printstartdate");
2872: my $closedate= $self->get_mapparam($res->symb(),'',"$part.printenddate");
1.485 foxr 2873:
2874:
2875: return ($opendate, $closedate);
2876: }
2877:
2878: sub get_mapparam {
1.518 raeburn 2879: my ($self, $symb, $mapname, $what) = @_;
1.485 foxr 2880:
2881: # Ensure the course option hash is populated:
2882:
2883: $self->generate_course_user_opt();
2884:
2885: # Get the course id and section if there is one.
2886:
2887: my $cid=$env{'request.course.id'};
2888: my $csec=$env{'request.course.sec'};
2889: my $cgroup='';
2890: my @cgrps=split(/:/,$env{'request.course.groups'});
2891: if (@cgrps > 0) {
2892: @cgrps = sort(@cgrps);
2893: $cgroup = $cgrps[0];
2894: }
2895: my $uname=$self->{USERNAME};
2896: my $udom=$self->{DOMAIN};
2897:
1.518 raeburn 2898: unless ($symb || $mapname) { return; }
1.485 foxr 2899: my $result='';
1.516 raeburn 2900: my ($recursed,@recurseup);
1.485 foxr 2901:
2902:
2903: # Figure out which map we are in.
2904:
1.518 raeburn 2905: if ($symb && !$mapname) {
2906: my ($id,$fn);
2907: ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
2908: $mapname = &Apache::lonnet::deversion($mapname);
2909: }
1.485 foxr 2910:
2911:
2912: my $rwhat=$what;
2913: $what=~s/^parameter\_//;
2914: $what=~s/\_/\./;
2915:
2916: # Build the hash keys for the lookup:
2917:
2918: my $mapparm=$mapname.'___(all).'.$what;
1.515 raeburn 2919: my $recurseparm=$mapname.'___(rec).'.$what;
1.485 foxr 2920: my $usercourseprefix=$cid;
2921:
2922:
1.515 raeburn 2923: my $grplevelm = "$usercourseprefix.[$cgroup].$mapparm";
2924: my $seclevelm = "$usercourseprefix.[$csec].$mapparm";
2925: my $courselevelm = "$usercourseprefix.$mapparm";
2926:
2927: my $grpleveli = "$usercourseprefix.[$cgroup].$recurseparm";
2928: my $secleveli = "$usercourseprefix.[$csec].$recurseparm";
2929: my $courseleveli = "$usercourseprefix.$recurseparm";
1.485 foxr 2930:
2931: # Get handy references to the hashes we need in $self:
2932:
2933: my $useropt = $self->{USER_OPT};
2934: my $courseopt = $self->{COURSE_OPT};
2935: my $parmhash = $self->{PARM_HASH};
2936:
2937: # Check per user
2938:
2939:
2940:
2941: if ($uname and defined($useropt)) {
1.515 raeburn 2942: if (defined($$useropt{$courselevelm})) {
2943: return $$useropt{$courselevelm};
1.485 foxr 2944: }
1.515 raeburn 2945: if (defined($$useropt{$courseleveli})) {
2946: return $$useropt{$courseleveli};
2947: }
1.516 raeburn 2948: unless ($recursed) {
2949: @recurseup = $self->recurseup_maps($mapname);
2950: $recursed = 1;
2951: }
2952: foreach my $item (@recurseup) {
2953: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
1.526 raeburn 2954: if (defined($$useropt{$norecursechk})) {
2955: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2956: return $$useropt{$norecursechk};
2957: } else {
2958: last;
2959: }
2960: }
1.516 raeburn 2961: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
2962: if (defined($$useropt{$recursechk})) {
2963: return $$useropt{$recursechk};
2964: }
2965: }
1.485 foxr 2966: }
2967:
2968: # Check course -- group
2969:
2970:
2971:
2972: if ($cgroup ne '' and defined ($courseopt)) {
1.515 raeburn 2973: if (defined($$courseopt{$grplevelm})) {
2974: return $$courseopt{$grplevelm};
1.485 foxr 2975: }
1.515 raeburn 2976: if (defined($$courseopt{$grpleveli})) {
2977: return $$courseopt{$grpleveli};
2978: }
1.516 raeburn 2979: unless ($recursed) {
2980: @recurseup = $self->recurseup_maps($mapname);
2981: $recursed = 1;
2982: }
2983: foreach my $item (@recurseup) {
2984: my $norecursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(all).'.$what;
1.526 raeburn 2985: if (defined($$courseopt{$norecursechk})) {
2986: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
2987: return $$courseopt{$norecursechk};
2988: } else {
2989: last;
2990: }
2991: }
1.516 raeburn 2992: my $recursechk=$usercourseprefix.'.['.$cgroup.'].'.$item.'___(rec).'.$what;
2993: if (defined($$courseopt{$recursechk})) {
2994: return $$courseopt{$recursechk};
2995: }
2996: }
1.485 foxr 2997: }
2998:
2999: # Check course -- section
3000:
3001:
1.516 raeburn 3002: if ($csec ne '' and defined($courseopt)) {
1.515 raeburn 3003: if (defined($$courseopt{$seclevelm})) {
3004: return $$courseopt{$seclevelm};
1.485 foxr 3005: }
1.515 raeburn 3006: if (defined($$courseopt{$secleveli})) {
3007: return $$courseopt{$secleveli};
3008: }
1.516 raeburn 3009: unless ($recursed) {
3010: @recurseup = $self->recurseup_maps($mapname);
3011: $recursed = 1;
3012: }
3013: foreach my $item (@recurseup) {
3014: my $norecursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(all).'.$what;
1.526 raeburn 3015: if (defined($$courseopt{$norecursechk})) {
3016: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3017: return $$courseopt{$norecursechk};
3018: } else {
3019: last;
3020: }
3021: }
1.516 raeburn 3022: my $recursechk=$usercourseprefix.'.['.$csec.'].'.$item.'___(rec).'.$what;
3023: if (defined($$courseopt{$recursechk})) {
3024: return $$courseopt{$recursechk};
3025: }
3026: }
1.485 foxr 3027: }
3028: # Check the map parameters themselves:
3029:
1.518 raeburn 3030: if ($symb) {
3031: my $symbparm=$symb.'.'.$what;
3032: my $thisparm = $$parmhash{$symbparm};
3033: if (defined($thisparm)) {
3034: return $thisparm;
3035: }
1.485 foxr 3036: }
3037:
3038:
3039: # Additional course parameters:
3040:
3041: if (defined($courseopt)) {
1.515 raeburn 3042: if (defined($$courseopt{$courselevelm})) {
3043: return $$courseopt{$courselevelm};
1.485 foxr 3044: }
1.516 raeburn 3045: unless ($recursed) {
3046: @recurseup = $self->recurseup_maps($mapname);
3047: $recursed = 1;
3048: }
3049: if (@recurseup) {
3050: foreach my $item (@recurseup) {
3051: my $norecursechk=$usercourseprefix.'.'.$item.'___(all).'.$what;
1.526 raeburn 3052: if (defined($$courseopt{$norecursechk})) {
3053: if ($what =~ /\.(encrypturl|hiddenresource)$/) {
3054: return $$courseopt{$norecursechk};
3055: } else {
3056: last;
3057: }
3058: }
1.516 raeburn 3059: my $recursechk=$usercourseprefix.'.'.$item.'___(rec).'.$what;
3060: if (defined($$courseopt{$recursechk})) {
3061: return $$courseopt{$recursechk};
3062: }
3063: }
3064: }
1.485 foxr 3065: }
1.516 raeburn 3066: return undef; # Undefined if we got here.
1.485 foxr 3067: }
3068:
3069: sub course_printdates {
3070: my ($self, $symb, $part) = @_;
3071:
3072:
3073: my $opendate = $self->getcourseparam($symb, $part . '.printstartdate');
3074: my $closedate = $self->getcourseparam($symb, $part . '.printenddate');
3075: return ($opendate, $closedate);
3076:
3077: }
3078:
3079: sub getcourseparam {
3080: my ($self, $symb, $what) = @_;
3081:
3082: $self->generate_course_user_opt(); # If necessary populate the hashes.
3083:
3084: my $uname = $self->{USERNAME};
3085: my $udom = $self->{DOMAIN};
3086:
3087: # Course, section, group ids come from the env:
3088:
3089: my $cid = $env{'request.course.id'};
3090: my $csec = $env{'request.course.sec'};
3091: my $cgroup = ''; # Assume no group
3092:
3093: my @cgroups = split(/:/, $env{'request.course.groups'});
3094: if(@cgroups > 0) {
3095: @cgroups = sort(@cgroups);
3096: $cgroup = $cgroups[0]; # There is a course group.
3097: }
3098: my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);
3099: $mapname = &Apache::lonnet::deversion($mapname);
3100:
3101: #
3102: # Make the various lookup keys:
3103: #
3104:
3105: $what=~s/^parameter\_//;
3106: $what=~s/\_/\./;
3107:
3108: # Local refs to the hashes we're going to look at:
3109:
3110: my $useropt = $self->{USER_OPT};
3111: my $courseopt = $self->{COURSE_OPT};
3112:
3113: #
3114: # We want the course level stuff from the way
3115: # parmval_real operates
1.513 raeburn 3116: # TODO: Factor some of this stuff out of
1.485 foxr 3117: # both parmval_real and here
3118: #
3119: my $courselevel = $cid . '.' . $what;
3120: my $grplevel = $cid . '.[' . $cgroup . ']' . $what;
3121: my $seclevel = $cid . '.[' . $csec . ']' . $what;
3122:
3123:
3124: # Try for the user's course level option:
3125:
3126: if ($uname and defined($useropt)) {
3127: if (defined($$useropt{$courselevel})) {
3128: return $$useropt{$courselevel};
3129: }
3130: }
3131: # Try for the group's course level option:
3132:
1.513 raeburn 3133: if ($cgroup ne '' and defined($courseopt)) {
1.485 foxr 3134: if (defined($$courseopt{$grplevel})) {
3135: return $$courseopt{$grplevel};
3136: }
3137: }
3138:
3139: # Try for section level parameters:
3140:
1.513 raeburn 3141: if ($csec ne '' and defined($courseopt)) {
1.485 foxr 3142: if (defined($$courseopt{$seclevel})) {
3143: return $$courseopt{$seclevel};
3144: }
3145: }
1.513 raeburn 3146: # Try for 'additional' course parameters:
1.485 foxr 3147:
3148: if (defined($courseopt)) {
3149: if (defined($$courseopt{$courselevel})) {
3150: return $$courseopt{$courselevel};
3151: }
3152: }
3153: return undef;
3154:
3155: }
3156:
1.145 bowersj2 3157:
1.174 albertel 3158: =pod
1.145 bowersj2 3159:
1.352 raeburn 3160: =item * B<getResourceByUrl>(url,multiple):
1.145 bowersj2 3161:
1.352 raeburn 3162: Retrieves a resource object by URL of the resource, unless the optional
1.398 banghart 3163: multiple parameter is included in which case an array of resource
1.352 raeburn 3164: objects is returned. If passed a resource object, it will simply return
3165: it, so it is safe to use this method in code like
3166: "$res = $navmap->getResourceByUrl($res)"
3167: if you're not sure if $res is already an object, or just a URL. If the
3168: resource appears multiple times in the course, only the first instance
3169: will be returned (useful for maps), unless the multiple parameter has
3170: been included, in which case all instances are returned in an array.
1.174 albertel 3171:
1.505 raeburn 3172: =item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall, noblockcheck):
1.174 albertel 3173:
3174: The map is a specification of a map to retreive the resources from,
3175: either as a url or as an object. The filterFunc is a reference to a
3176: function that takes a resource object as its one argument and returns
3177: true if the resource should be included, or false if it should not
3178: be. If recursive is true, the map will be recursively examined,
3179: otherwise it will not be. If bailout is true, the function will return
1.314 albertel 3180: as soon as it finds a resource, if false it will finish. If showall is
1.505 raeburn 3181: true it will not hide maps that contain nothing but one other map. The
3182: noblockcheck arg is propagated to become the sixth arg in the call to
3183: lonnet::allowed when checking a resource's availability during collection
3184: of resources using the iterator. noblockcheck needs to be true if
3185: retrieveResources() was called by a routine that itself was called by
3186: lonnet::allowed, in order to avoid recursion. By default the map
3187: is the top-level map of the course, filterFunc is a function that
3188: always returns 1, recursive is true, bailout is false, showall is
3189: false. The resources will be returned in a list containing the
3190: resource objects for the corresponding resources, with B<no structure
3191: information> in the list; regardless of branching, recursion, etc.,
3192: it will be a flat list.
1.174 albertel 3193:
3194: Thus, this is suitable for cases where you don't want the structure,
3195: just a list of all resources. It is also suitable for finding out how
3196: many resources match a given description; for this use, if all you
3197: want to know is if I<any> resources match the description, the bailout
3198: parameter will allow you to avoid potentially expensive enumeration of
3199: all matching resources.
1.145 bowersj2 3200:
1.318 albertel 3201: =item * B<hasResource>(map, filterFunc, recursive, showall):
1.145 bowersj2 3202:
1.398 banghart 3203: Convenience method for
1.146 bowersj2 3204:
1.318 albertel 3205: scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
1.146 bowersj2 3206:
1.174 albertel 3207: which will tell whether the map has resources matching the description
3208: in the filter function.
1.146 bowersj2 3209:
1.352 raeburn 3210: =item * B<usedVersion>(url):
3211:
3212: Retrieves version infomation for a url. Returns the version (a number, or
3213: the string "mostrecent") for resources which have version information in
3214: the big hash.
1.448 raeburn 3215:
1.145 bowersj2 3216: =cut
3217:
1.277 matthew 3218:
1.145 bowersj2 3219: sub getResourceByUrl {
3220: my $self = shift;
3221: my $resUrl = shift;
1.352 raeburn 3222: my $multiple = shift;
1.145 bowersj2 3223:
3224: if (ref($resUrl)) { return $resUrl; }
3225:
3226: $resUrl = &Apache::lonnet::clutter($resUrl);
3227: my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
1.352 raeburn 3228: if (!$resId) { return ''; }
3229: if ($multiple) {
3230: my @resources = ();
3231: my @resIds = split (/,/, $resId);
3232: foreach my $id (@resIds) {
1.353 raeburn 3233: my $resourceId = $self->getById($id);
3234: if ($resourceId) {
3235: push(@resources,$resourceId);
1.352 raeburn 3236: }
3237: }
3238: return @resources;
3239: } else {
3240: if ($resId =~ /,/) {
3241: $resId = (split (/,/, $resId))[0];
3242: }
3243: return $self->getById($resId);
1.145 bowersj2 3244: }
3245: }
3246:
3247: sub retrieveResources {
3248: my $self = shift;
3249: my $map = shift;
3250: my $filterFunc = shift;
3251: if (!defined ($filterFunc)) {
3252: $filterFunc = sub {return 1;};
3253: }
3254: my $recursive = shift;
3255: if (!defined($recursive)) { $recursive = 1; }
3256: my $bailout = shift;
3257: if (!defined($bailout)) { $bailout = 0; }
1.314 albertel 3258: my $showall = shift;
1.506 raeburn 3259: my $noblockcheck = shift;
1.145 bowersj2 3260: # Create the necessary iterator.
3261: if (!ref($map)) { # assume it's a url of a map.
1.172 bowersj2 3262: $map = $self->getResourceByUrl($map);
1.145 bowersj2 3263: }
3264:
1.213 bowersj2 3265: # If nothing was passed, assume top-level map
3266: if (!$map) {
3267: $map = $self->getById('0.0');
3268: }
3269:
1.145 bowersj2 3270: # Check the map's validity.
1.213 bowersj2 3271: if (!$map->is_map()) {
1.145 bowersj2 3272: # Oh, to throw an exception.... how I'd love that!
3273: return ();
3274: }
3275:
1.146 bowersj2 3276: # Get an iterator.
3277: my $it = $self->getIterator($map->map_start(), $map->map_finish(),
1.314 albertel 3278: undef, $recursive, $showall);
1.146 bowersj2 3279:
3280: my @resources = ();
3281:
1.400 albertel 3282: if (&$filterFunc($map)) {
3283: push(@resources, $map);
3284: }
3285:
1.146 bowersj2 3286: # Run down the iterator and collect the resources.
1.222 bowersj2 3287: my $curRes;
3288:
1.505 raeburn 3289: while ($curRes = $it->next(undef,$noblockcheck)) {
1.146 bowersj2 3290: if (ref($curRes)) {
3291: if (!&$filterFunc($curRes)) {
3292: next;
3293: }
3294:
1.400 albertel 3295: push(@resources, $curRes);
1.146 bowersj2 3296:
3297: if ($bailout) {
3298: return @resources;
3299: }
3300: }
3301:
3302: }
3303:
3304: return @resources;
3305: }
3306:
3307: sub hasResource {
3308: my $self = shift;
3309: my $map = shift;
3310: my $filterFunc = shift;
3311: my $recursive = shift;
1.318 albertel 3312: my $showall = shift;
1.146 bowersj2 3313:
1.318 albertel 3314: return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
1.133 bowersj2 3315: }
1.51 bowersj2 3316:
1.352 raeburn 3317: sub usedVersion {
3318: my $self = shift;
3319: my $linkurl = shift;
3320: return $self->navhash("version_$linkurl");
3321: }
3322:
1.51 bowersj2 3323: 1;
3324:
3325: package Apache::lonnavmaps::iterator;
1.365 albertel 3326: use Scalar::Util qw(weaken);
1.320 albertel 3327: use Apache::lonnet;
3328:
1.51 bowersj2 3329: =pod
3330:
3331: =back
3332:
1.174 albertel 3333: =head1 Object: navmap Iterator
1.51 bowersj2 3334:
1.174 albertel 3335: An I<iterator> encapsulates the logic required to traverse a data
3336: structure. navmap uses an iterator to traverse the course map
3337: according to the criteria you wish to use.
3338:
3339: To obtain an iterator, call the B<getIterator>() function of a
3340: B<navmap> object. (Do not instantiate Apache::lonnavmaps::iterator
3341: directly.) This will return a reference to the iterator:
1.51 bowersj2 3342:
3343: C<my $resourceIterator = $navmap-E<gt>getIterator();>
3344:
3345: To get the next thing from the iterator, call B<next>:
3346:
3347: C<my $nextThing = $resourceIterator-E<gt>next()>
3348:
3349: getIterator behaves as follows:
3350:
3351: =over 4
3352:
1.174 albertel 3353: =item * B<getIterator>(firstResource, finishResource, filterHash, condition, forceTop, returnTopMap):
3354:
3355: All parameters are optional. firstResource is a resource reference
3356: corresponding to where the iterator should start. It defaults to
3357: navmap->firstResource() for the corresponding nav map. finishResource
3358: corresponds to where you want the iterator to end, defaulting to
3359: navmap->finishResource(). filterHash is a hash used as a set
3360: containing strings representing the resource IDs, defaulting to
3361: empty. Condition is a 1 or 0 that sets what to do with the filter
1.205 bowersj2 3362: hash: If a 0, then only resources that exist IN the filterHash will be
1.174 albertel 3363: recursed on. If it is a 1, only resources NOT in the filterHash will
3364: be recursed on. Defaults to 0. forceTop is a boolean value. If it is
3365: false (default), the iterator will only return the first level of map
3366: that is not just a single, 'redirecting' map. If true, the iterator
3367: will return all information, starting with the top-level map,
3368: regardless of content. returnTopMap, if true (default false), will
3369: cause the iterator to return the top-level map object (resource 0.0)
3370: before anything else.
3371:
3372: Thus, by default, only top-level resources will be shown. Change the
3373: condition to a 1 without changing the hash, and all resources will be
3374: shown. Changing the condition to 1 and including some values in the
3375: hash will allow you to selectively suppress parts of the navmap, while
3376: leaving it on 0 and adding things to the hash will allow you to
3377: selectively add parts of the nav map. See the handler code for
3378: examples.
3379:
3380: The iterator will return either a reference to a resource object, or a
3381: token representing something in the map, such as the beginning of a
3382: new branch. The possible tokens are:
3383:
3384: =over 4
1.51 bowersj2 3385:
1.222 bowersj2 3386: =item * B<END_ITERATOR>:
3387:
3388: The iterator has returned all that it's going to. Further calls to the
3389: iterator will just produce more of these. This is a "false" value, and
3390: is the only false value the iterator which will be returned, so it can
3391: be used as a loop sentinel.
3392:
1.217 bowersj2 3393: =item * B<BEGIN_MAP>:
1.51 bowersj2 3394:
1.174 albertel 3395: A new map is being recursed into. This is returned I<after> the map
3396: resource itself is returned.
1.51 bowersj2 3397:
1.217 bowersj2 3398: =item * B<END_MAP>:
1.174 albertel 3399:
3400: The map is now done.
1.51 bowersj2 3401:
1.217 bowersj2 3402: =item * B<BEGIN_BRANCH>:
1.70 bowersj2 3403:
1.174 albertel 3404: A branch is now starting. The next resource returned will be the first
3405: in that branch.
1.70 bowersj2 3406:
1.217 bowersj2 3407: =item * B<END_BRANCH>:
1.70 bowersj2 3408:
1.174 albertel 3409: The branch is now done.
1.51 bowersj2 3410:
3411: =back
3412:
1.174 albertel 3413: The tokens are retreivable via methods on the iterator object, i.e.,
3414: $iterator->END_MAP.
1.70 bowersj2 3415:
1.174 albertel 3416: Maps can contain empty resources. The iterator will automatically skip
3417: over such resources, but will still treat the structure
3418: correctly. Thus, a complicated map with several branches, but
3419: consisting entirely of empty resources except for one beginning or
3420: ending resource, will cause a lot of BRANCH_STARTs and BRANCH_ENDs,
3421: but only one resource will be returned.
1.116 bowersj2 3422:
1.242 matthew 3423: =back
3424:
1.222 bowersj2 3425: =head2 Normal Usage
3426:
3427: Normal usage of the iterator object is to do the following:
3428:
3429: my $it = $navmap->getIterator([your params here]);
3430: my $curRes;
3431: while ($curRes = $it->next()) {
3432: [your logic here]
3433: }
3434:
3435: Note that inside of the loop, it's frequently useful to check if
3436: "$curRes" is a reference or not with the reference function; only
3437: resource objects will be references, and any non-references will
3438: be the tokens described above.
3439:
1.505 raeburn 3440: The next() routine can take two (optional) arguments:
3441: closeAllPages - if true will not recurse down a .page
3442: noblockcheck - passed to browsePriv() for passing as sixth arg to
3443: call to lonnet::allowed. This needs to be set if retrieveResources
3444: was already called from another routine called within lonnet::allowed,
3445: so as to prevent recursion.
3446:
1.506 raeburn 3447: Also note there is some old code floating around that tries to track
1.222 bowersj2 3448: the depth of the iterator to see when it's done; do not copy that
1.398 banghart 3449: code. It is difficult to get right and harder to understand than
1.222 bowersj2 3450: this. They should be migrated to this new style.
1.51 bowersj2 3451:
3452: =cut
3453:
3454: # Here are the tokens for the iterator:
3455:
1.222 bowersj2 3456: sub END_ITERATOR { return 0; }
1.51 bowersj2 3457: sub BEGIN_MAP { return 1; } # begining of a new map
3458: sub END_MAP { return 2; } # end of the map
3459: sub BEGIN_BRANCH { return 3; } # beginning of a branch
3460: sub END_BRANCH { return 4; } # end of a branch
1.89 bowersj2 3461: sub FORWARD { return 1; } # go forward
3462: sub BACKWARD { return 2; }
1.51 bowersj2 3463:
1.96 bowersj2 3464: sub min {
3465: (my $a, my $b) = @_;
3466: if ($a < $b) { return $a; } else { return $b; }
3467: }
3468:
1.94 bowersj2 3469: sub new {
3470: # magic invocation to create a class instance
3471: my $proto = shift;
3472: my $class = ref($proto) || $proto;
3473: my $self = {};
3474:
1.300 albertel 3475: weaken($self->{NAV_MAP} = shift);
1.94 bowersj2 3476: return undef unless ($self->{NAV_MAP});
3477:
1.454 www 3478: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3479: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3480:
1.94 bowersj2 3481: # Handle the parameters
3482: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3483: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3484:
3485: # If the given resources are just the ID of the resource, get the
3486: # objects
3487: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3488: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3489: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3490: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3491:
3492: $self->{FILTER} = shift;
3493:
3494: # A hash, used as a set, of resource already seen
3495: $self->{ALREADY_SEEN} = shift;
3496: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
3497: $self->{CONDITION} = shift;
3498:
1.116 bowersj2 3499: # Do we want to automatically follow "redirection" maps?
3500: $self->{FORCE_TOP} = shift;
3501:
1.162 bowersj2 3502: # Do we want to return the top-level map object (resource 0.0)?
3503: $self->{RETURN_0} = shift;
3504: # have we done that yet?
3505: $self->{HAVE_RETURNED_0} = 0;
3506:
1.94 bowersj2 3507: # Now, we need to pre-process the map, by walking forward and backward
3508: # over the parts of the map we're going to look at.
1.96 bowersj2 3509:
1.97 bowersj2 3510: # The processing steps are exactly the same, except for a few small
3511: # changes, so I bundle those up in the following list of two elements:
3512: # (direction_to_iterate, VAL_name, next_resource_method_to_call,
3513: # first_resource).
3514: # This prevents writing nearly-identical code twice.
3515: my @iterations = ( [FORWARD(), 'TOP_DOWN_VAL', 'getNext',
3516: 'FIRST_RESOURCE'],
3517: [BACKWARD(), 'BOT_UP_VAL', 'getPrevious',
3518: 'FINISH_RESOURCE'] );
3519:
1.98 bowersj2 3520: my $maxDepth = 0; # tracks max depth
3521:
1.116 bowersj2 3522: # If there is only one resource in this map, and it's a map, we
3523: # want to remember that, so the user can ask for the first map
3524: # that isn't just a redirector.
3525: my $resource; my $resourceCount = 0;
3526:
1.209 bowersj2 3527: # Documentation on this algorithm can be found in the CVS repository at
3528: # /docs/lonnavdocs; these "**#**" markers correspond to documentation
3529: # in that file.
1.107 bowersj2 3530: # **1**
3531:
1.97 bowersj2 3532: foreach my $pass (@iterations) {
3533: my $direction = $pass->[0];
3534: my $valName = $pass->[1];
3535: my $nextResourceMethod = $pass->[2];
3536: my $firstResourceName = $pass->[3];
3537:
3538: my $iterator = Apache::lonnavmaps::DFSiterator->new($self->{NAV_MAP},
3539: $self->{FIRST_RESOURCE},
3540: $self->{FINISH_RESOURCE},
3541: {}, undef, 0, $direction);
1.96 bowersj2 3542:
1.97 bowersj2 3543: # prime the recursion
3544: $self->{$firstResourceName}->{DATA}->{$valName} = 0;
1.222 bowersj2 3545: $iterator->next();
1.97 bowersj2 3546: my $curRes = $iterator->next();
1.222 bowersj2 3547: my $depth = 1;
3548: while ($depth > 0) {
3549: if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
3550: if ($curRes == $iterator->END_MAP()) { $depth--; }
3551:
1.97 bowersj2 3552: if (ref($curRes)) {
1.116 bowersj2 3553: # If there's only one resource, this will save it
1.117 bowersj2 3554: # we have to filter empty resources from consideration here,
3555: # or even "empty", redirecting maps have two (start & finish)
3556: # or three (start, finish, plus redirector)
3557: if($direction == FORWARD && $curRes->src()) {
3558: $resource = $curRes; $resourceCount++;
3559: }
1.97 bowersj2 3560: my $resultingVal = $curRes->{DATA}->{$valName};
3561: my $nextResources = $curRes->$nextResourceMethod();
1.116 bowersj2 3562: my $nextCount = scalar(@{$nextResources});
1.104 bowersj2 3563:
1.116 bowersj2 3564: if ($nextCount == 1) { # **3**
1.97 bowersj2 3565: my $current = $nextResources->[0]->{DATA}->{$valName} || 999999999;
3566: $nextResources->[0]->{DATA}->{$valName} = min($resultingVal, $current);
3567: }
3568:
1.116 bowersj2 3569: if ($nextCount > 1) { # **4**
1.97 bowersj2 3570: foreach my $res (@{$nextResources}) {
3571: my $current = $res->{DATA}->{$valName} || 999999999;
3572: $res->{DATA}->{$valName} = min($current, $resultingVal + 1);
3573: }
3574: }
3575: }
1.96 bowersj2 3576:
1.107 bowersj2 3577: # Assign the final val (**2**)
1.97 bowersj2 3578: if (ref($curRes) && $direction == BACKWARD()) {
1.98 bowersj2 3579: my $finalDepth = min($curRes->{DATA}->{TOP_DOWN_VAL},
3580: $curRes->{DATA}->{BOT_UP_VAL});
3581:
3582: $curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
3583: if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
1.190 bowersj2 3584: }
1.222 bowersj2 3585:
3586: $curRes = $iterator->next();
1.96 bowersj2 3587: }
3588: }
1.94 bowersj2 3589:
1.116 bowersj2 3590: # Check: Was this only one resource, a map?
1.255 albertel 3591: if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
1.116 bowersj2 3592: my $firstResource = $resource->map_start();
3593: my $finishResource = $resource->map_finish();
1.500 raeburn 3594: return Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3595: $finishResource, $self->{FILTER},
3596: $self->{ALREADY_SEEN},
3597: $self->{CONDITION},
3598: $self->{FORCE_TOP});
1.116 bowersj2 3599: }
3600:
1.98 bowersj2 3601: # Set up some bookkeeping information.
3602: $self->{CURRENT_DEPTH} = 0;
3603: $self->{MAX_DEPTH} = $maxDepth;
3604: $self->{STACK} = [];
3605: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
1.222 bowersj2 3606: $self->{FINISHED} = 0; # When true, the iterator has finished
1.98 bowersj2 3607:
3608: for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
3609: push @{$self->{STACK}}, [];
3610: }
3611:
1.107 bowersj2 3612: # Prime the recursion w/ the first resource **5**
1.98 bowersj2 3613: push @{$self->{STACK}->[0]}, $self->{FIRST_RESOURCE};
3614: $self->{ALREADY_SEEN}->{$self->{FIRST_RESOURCE}->{ID}} = 1;
3615:
3616: bless ($self);
3617: return $self;
3618: }
3619:
3620: sub next {
3621: my $self = shift;
1.256 albertel 3622: my $closeAllPages=shift;
1.505 raeburn 3623: my $noblockcheck = shift;
1.222 bowersj2 3624: if ($self->{FINISHED}) {
3625: return END_ITERATOR();
3626: }
3627:
1.162 bowersj2 3628: # If we want to return the top-level map object, and haven't yet,
3629: # do so.
3630: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0}) {
3631: $self->{HAVE_RETURNED_0} = 1;
1.470 foxr 3632: my $nextTopLevel = $self->{NAV_MAP}->getById('0.0');
1.162 bowersj2 3633: return $self->{NAV_MAP}->getById('0.0');
3634: }
1.401 albertel 3635: if ($self->{RETURN_0} && !$self->{HAVE_RETURNED_0_BEGIN_MAP}) {
3636: $self->{HAVE_RETURNED_0_BEGIN_MAP} = 1;
3637: return $self->BEGIN_MAP();
3638: }
1.98 bowersj2 3639:
3640: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3641: # grab the next from the recursive iterator
1.256 albertel 3642: my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);
1.98 bowersj2 3643:
3644: # is it a begin or end map? If so, update the depth
3645: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3646: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3647:
3648: # Are we back at depth 0? If so, stop recursing
3649: if ($self->{RECURSIVE_DEPTH} == 0) {
3650: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3651: }
3652: return $next;
3653: }
3654:
3655: if (defined($self->{FORCE_NEXT})) {
3656: my $tmp = $self->{FORCE_NEXT};
3657: $self->{FORCE_NEXT} = undef;
3658: return $tmp;
3659: }
3660:
3661: # Have we not yet begun? If not, return BEGIN_MAP and
3662: # remember we've started.
3663: if ( !$self->{STARTED} ) {
3664: $self->{STARTED} = 1;
3665: return $self->BEGIN_MAP();
3666: }
3667:
3668: # Here's the guts of the iterator.
3669:
3670: # Find the next resource, if any.
3671: my $found = 0;
3672: my $i = $self->{MAX_DEPTH};
3673: my $newDepth;
3674: my $here;
3675: while ( $i >= 0 && !$found ) {
1.107 bowersj2 3676: if ( scalar(@{$self->{STACK}->[$i]}) > 0 ) { # **6**
3677: $here = pop @{$self->{STACK}->[$i]}; # **7**
1.98 bowersj2 3678: $found = 1;
3679: $newDepth = $i;
3680: }
3681: $i--;
3682: }
3683:
3684: # If we still didn't find anything, we're done.
3685: if ( !$found ) {
3686: # We need to get back down to the correct branch depth
3687: if ( $self->{CURRENT_DEPTH} > 0 ) {
3688: $self->{CURRENT_DEPTH}--;
3689: return END_BRANCH();
3690: } else {
1.222 bowersj2 3691: $self->{FINISHED} = 1;
1.98 bowersj2 3692: return END_MAP();
3693: }
3694: }
3695:
1.104 bowersj2 3696: # If this is not a resource, it must be an END_BRANCH marker we want
3697: # to return directly.
1.107 bowersj2 3698: if (!ref($here)) { # **8**
1.104 bowersj2 3699: if ($here == END_BRANCH()) { # paranoia, in case of later extension
3700: $self->{CURRENT_DEPTH}--;
3701: return $here;
3702: }
3703: }
3704:
3705: # Otherwise, it is a resource and it's safe to store in $self->{HERE}
3706: $self->{HERE} = $here;
3707:
1.98 bowersj2 3708: # Get to the right level
3709: if ( $self->{CURRENT_DEPTH} > $newDepth ) {
3710: push @{$self->{STACK}->[$newDepth]}, $here;
3711: $self->{CURRENT_DEPTH}--;
3712: return END_BRANCH();
3713: }
3714: if ( $self->{CURRENT_DEPTH} < $newDepth) {
3715: push @{$self->{STACK}->[$newDepth]}, $here;
3716: $self->{CURRENT_DEPTH}++;
3717: return BEGIN_BRANCH();
3718: }
3719:
3720: # If we made it here, we have the next resource, and we're at the
3721: # right branch level. So let's examine the resource for where
3722: # we can get to from here.
3723:
3724: # So we need to look at all the resources we can get to from here,
3725: # categorize them if we haven't seen them, remember if we have a new
3726: my $nextUnfiltered = $here->getNext();
1.470 foxr 3727:
3728:
1.104 bowersj2 3729: my $maxDepthAdded = -1;
3730:
1.98 bowersj2 3731: for (@$nextUnfiltered) {
3732: if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {
1.104 bowersj2 3733: my $depth = $_->{DATA}->{DISPLAY_DEPTH};
3734: push @{$self->{STACK}->[$depth]}, $_;
1.98 bowersj2 3735: $self->{ALREADY_SEEN}->{$_->{ID}} = 1;
1.104 bowersj2 3736: if ($maxDepthAdded < $depth) { $maxDepthAdded = $depth; }
1.98 bowersj2 3737: }
3738: }
1.104 bowersj2 3739:
3740: # Is this the end of a branch? If so, all of the resources examined above
1.398 banghart 3741: # led to lower levels than the one we are currently at, so we push a END_BRANCH
1.104 bowersj2 3742: # marker onto the stack so we don't forget.
3743: # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
3744: # BC branch and gets to C, it will see F as the only next resource, but it's
3745: # one level lower. Thus, this is the end of the branch, since there are no
3746: # more resources added to this level or above.
1.111 bowersj2 3747: # We don't do this if the examined resource is the finish resource,
3748: # because the condition given above is true, but the "END_MAP" will
3749: # take care of things and we should already be at depth 0.
1.104 bowersj2 3750: my $isEndOfBranch = $maxDepthAdded < $self->{CURRENT_DEPTH};
1.111 bowersj2 3751: if ($isEndOfBranch && $here != $self->{FINISH_RESOURCE}) { # **9**
1.104 bowersj2 3752: push @{$self->{STACK}->[$self->{CURRENT_DEPTH}]}, END_BRANCH();
3753: }
3754:
1.98 bowersj2 3755: # That ends the main iterator logic. Now, do we want to recurse
3756: # down this map (if this resource is a map)?
1.256 albertel 3757: if ( ($self->{HERE}->is_sequence() || (!$closeAllPages && $self->{HERE}->is_page())) &&
1.98 bowersj2 3758: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
3759: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3760: my $firstResource = $self->{HERE}->map_start();
3761: my $finishResource = $self->{HERE}->map_finish();
3762: $self->{RECURSIVE_ITERATOR} =
3763: Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
3764: $finishResource, $self->{FILTER},
1.314 albertel 3765: $self->{ALREADY_SEEN},
3766: $self->{CONDITION},
3767: $self->{FORCE_TOP});
1.98 bowersj2 3768: }
3769:
1.116 bowersj2 3770: # If this is a blank resource, don't actually return it.
1.117 bowersj2 3771: # Should you ever find you need it, make sure to add an option to the code
3772: # that you can use; other things depend on this behavior.
1.505 raeburn 3773: my $browsePriv = $self->{HERE}->browsePriv($noblockcheck);
1.138 bowersj2 3774: if (!$self->{HERE}->src() ||
3775: (!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
1.256 albertel 3776: return $self->next($closeAllPages);
1.116 bowersj2 3777: }
3778:
1.98 bowersj2 3779: return $self->{HERE};
3780:
3781: }
3782:
3783: =pod
3784:
1.174 albertel 3785: The other method available on the iterator is B<getStack>, which
3786: returns an array populated with the current 'stack' of maps, as
3787: references to the resource objects. Example: This is useful when
3788: making the navigation map, as we need to check whether we are under a
3789: page map to see if we need to link directly to the resource, or to the
3790: page. The first elements in the array will correspond to the top of
3791: the stack (most inclusive map).
1.98 bowersj2 3792:
3793: =cut
3794:
3795: sub getStack {
3796: my $self=shift;
3797:
3798: my @stack;
3799:
3800: $self->populateStack(\@stack);
3801:
3802: return \@stack;
3803: }
3804:
3805: # Private method: Calls the iterators recursively to populate the stack.
3806: sub populateStack {
3807: my $self=shift;
3808: my $stack = shift;
3809:
3810: push @$stack, $self->{HERE} if ($self->{HERE});
3811:
3812: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
3813: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
3814: }
1.94 bowersj2 3815: }
3816:
3817: 1;
3818:
3819: package Apache::lonnavmaps::DFSiterator;
1.365 albertel 3820: use Scalar::Util qw(weaken);
1.320 albertel 3821: use Apache::lonnet;
3822:
1.100 bowersj2 3823: # Not documented in the perldoc: This is a simple iterator that just walks
3824: # through the nav map and presents the resources in a depth-first search
3825: # fashion, ignorant of conditionals, randomized resources, etc. It presents
3826: # BEGIN_MAP and END_MAP, but does not understand branches at all. It is
3827: # useful for pre-processing of some kind, and is in fact used by the main
3828: # iterator that way, but that's about it.
3829: # One could imagine merging this into the init routine of the main iterator,
1.251 www 3830: # but this might as well be left separate, since it is possible some other
1.100 bowersj2 3831: # use might be found for it. - Jeremy
1.94 bowersj2 3832:
1.117 bowersj2 3833: # Unlike the main iterator, this DOES return all resources, even blank ones.
3834: # The main iterator needs them to correctly preprocess the map.
3835:
1.94 bowersj2 3836: sub BEGIN_MAP { return 1; } # begining of a new map
3837: sub END_MAP { return 2; } # end of the map
3838: sub FORWARD { return 1; } # go forward
3839: sub BACKWARD { return 2; }
3840:
1.100 bowersj2 3841: # Params: Nav map ref, first resource id/ref, finish resource id/ref,
3842: # filter hash ref (or undef), already seen hash or undef, condition
3843: # (as in main iterator), direction FORWARD or BACKWARD (undef->forward).
1.51 bowersj2 3844: sub new {
3845: # magic invocation to create a class instance
3846: my $proto = shift;
3847: my $class = ref($proto) || $proto;
3848: my $self = {};
3849:
1.300 albertel 3850: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 3851: return undef unless ($self->{NAV_MAP});
3852:
1.454 www 3853: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
3854: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
3855:
1.51 bowersj2 3856: $self->{FIRST_RESOURCE} = shift || $self->{NAV_MAP}->firstResource();
3857: $self->{FINISH_RESOURCE} = shift || $self->{NAV_MAP}->finishResource();
3858:
3859: # If the given resources are just the ID of the resource, get the
3860: # objects
3861: if (!ref($self->{FIRST_RESOURCE})) { $self->{FIRST_RESOURCE} =
3862: $self->{NAV_MAP}->getById($self->{FIRST_RESOURCE}); }
3863: if (!ref($self->{FINISH_RESOURCE})) { $self->{FINISH_RESOURCE} =
3864: $self->{NAV_MAP}->getById($self->{FINISH_RESOURCE}); }
3865:
3866: $self->{FILTER} = shift;
3867:
3868: # A hash, used as a set, of resource already seen
3869: $self->{ALREADY_SEEN} = shift;
1.140 bowersj2 3870: if (!defined($self->{ALREADY_SEEN})) { $self->{ALREADY_SEEN} = {} };
1.63 bowersj2 3871: $self->{CONDITION} = shift;
1.89 bowersj2 3872: $self->{DIRECTION} = shift || FORWARD();
1.51 bowersj2 3873:
1.100 bowersj2 3874: # Flag: Have we started yet?
1.51 bowersj2 3875: $self->{STARTED} = 0;
3876:
3877: # Should we continue calling the recursive iterator, if any?
3878: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3879: # The recursive iterator, if any
3880: $self->{RECURSIVE_ITERATOR} = undef;
3881: # Are we recursing on a map, or a branch?
3882: $self->{RECURSIVE_MAP} = 1; # we'll manually unset this when recursing on branches
3883: # And the count of how deep it is, so that this iterator can keep track of
3884: # when to pick back up again.
3885: $self->{RECURSIVE_DEPTH} = 0;
3886:
3887: # For keeping track of our branches, we maintain our own stack
1.100 bowersj2 3888: $self->{STACK} = [];
1.51 bowersj2 3889:
3890: # Start with the first resource
1.89 bowersj2 3891: if ($self->{DIRECTION} == FORWARD) {
1.100 bowersj2 3892: push @{$self->{STACK}}, $self->{FIRST_RESOURCE};
1.89 bowersj2 3893: } else {
1.100 bowersj2 3894: push @{$self->{STACK}}, $self->{FINISH_RESOURCE};
1.89 bowersj2 3895: }
1.51 bowersj2 3896:
3897: bless($self);
3898: return $self;
3899: }
3900:
3901: sub next {
3902: my $self = shift;
3903:
3904: # Are we using a recursive iterator? If so, pull from that and
3905: # watch the depth; we want to resume our level at the correct time.
1.98 bowersj2 3906: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
1.51 bowersj2 3907: # grab the next from the recursive iterator
3908: my $next = $self->{RECURSIVE_ITERATOR}->next();
3909:
3910: # is it a begin or end map? Update depth if so
3911: if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
3912: if ($next == END_MAP() ) { $self->{RECURSIVE_DEPTH}--; }
3913:
3914: # Are we back at depth 0? If so, stop recursing.
3915: if ($self->{RECURSIVE_DEPTH} == 0) {
3916: $self->{RECURSIVE_ITERATOR_FLAG} = 0;
3917: }
3918:
3919: return $next;
3920: }
3921:
3922: # Is there a current resource to grab? If not, then return
1.100 bowersj2 3923: # END_MAP, which will end the iterator.
3924: if (scalar(@{$self->{STACK}}) == 0) {
3925: return $self->END_MAP();
1.51 bowersj2 3926: }
3927:
3928: # Have we not yet begun? If not, return BEGIN_MAP and
3929: # remember that we've started.
3930: if ( !$self->{STARTED} ) {
3931: $self->{STARTED} = 1;
3932: return $self->BEGIN_MAP;
3933: }
3934:
3935: # Get the next resource in the branch
1.100 bowersj2 3936: $self->{HERE} = pop @{$self->{STACK}};
1.52 bowersj2 3937:
1.100 bowersj2 3938: # remember that we've seen this, so we don't return it again later
1.51 bowersj2 3939: $self->{ALREADY_SEEN}->{$self->{HERE}->{ID}} = 1;
3940:
3941: # Get the next possible resources
1.90 bowersj2 3942: my $nextUnfiltered;
1.89 bowersj2 3943: if ($self->{DIRECTION} == FORWARD()) {
1.90 bowersj2 3944: $nextUnfiltered = $self->{HERE}->getNext();
1.89 bowersj2 3945: } else {
1.90 bowersj2 3946: $nextUnfiltered = $self->{HERE}->getPrevious();
1.89 bowersj2 3947: }
1.51 bowersj2 3948: my $next = [];
3949:
3950: # filter the next possibilities to remove things we've
1.100 bowersj2 3951: # already seen.
1.394 raeburn 3952: foreach my $item (@$nextUnfiltered) {
3953: if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
3954: push @$next, $item;
1.52 bowersj2 3955: }
1.51 bowersj2 3956: }
3957:
3958: while (@$next) {
1.100 bowersj2 3959: # copy the next possibilities over to the stack
3960: push @{$self->{STACK}}, shift @$next;
1.51 bowersj2 3961: }
3962:
3963: # If this is a map and we want to recurse down it... (not filtered out)
1.70 bowersj2 3964: if ($self->{HERE}->is_map() &&
1.63 bowersj2 3965: (defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
1.51 bowersj2 3966: $self->{RECURSIVE_ITERATOR_FLAG} = 1;
3967: my $firstResource = $self->{HERE}->map_start();
3968: my $finishResource = $self->{HERE}->map_finish();
3969:
3970: $self->{RECURSIVE_ITERATOR} =
1.94 bowersj2 3971: Apache::lonnavmaps::DFSiterator->new ($self->{NAV_MAP}, $firstResource,
1.63 bowersj2 3972: $finishResource, $self->{FILTER}, $self->{ALREADY_SEEN},
1.91 bowersj2 3973: $self->{CONDITION}, $self->{DIRECTION});
1.51 bowersj2 3974: }
3975:
3976: return $self->{HERE};
1.190 bowersj2 3977: }
3978:
3979: # Identical to the full iterator methods of the same name. Hate to copy/paste
3980: # but I also hate to "inherit" either iterator from the other.
3981:
3982: sub getStack {
3983: my $self=shift;
3984:
3985: my @stack;
3986:
3987: $self->populateStack(\@stack);
3988:
3989: return \@stack;
3990: }
3991:
3992: # Private method: Calls the iterators recursively to populate the stack.
3993: sub populateStack {
3994: my $self=shift;
3995: my $stack = shift;
3996:
3997: push @$stack, $self->{HERE} if ($self->{HERE});
3998:
3999: if ($self->{RECURSIVE_ITERATOR_FLAG}) {
4000: $self->{RECURSIVE_ITERATOR}->populateStack($stack);
4001: }
1.51 bowersj2 4002: }
4003:
1.1 www 4004: 1;
1.2 www 4005:
1.51 bowersj2 4006: package Apache::lonnavmaps::resource;
1.365 albertel 4007: use Scalar::Util qw(weaken);
1.51 bowersj2 4008: use Apache::lonnet;
4009:
4010: =pod
4011:
1.217 bowersj2 4012: =head1 Object: resource
1.51 bowersj2 4013:
1.217 bowersj2 4014: X<resource, navmap object>
1.174 albertel 4015: A resource object encapsulates a resource in a resource map, allowing
4016: easy manipulation of the resource, querying the properties of the
4017: resource (including user properties), and represents a reference that
4018: can be used as the canonical representation of the resource by
4019: lonnavmap clients like renderers.
4020:
4021: A resource only makes sense in the context of a navmap, as some of the
4022: data is stored in the navmap object.
4023:
4024: You will probably never need to instantiate this object directly. Use
4025: Apache::lonnavmaps::navmap, and use the "start" method to obtain the
4026: starting resource.
1.51 bowersj2 4027:
1.188 bowersj2 4028: Resource objects respect the parameter_hiddenparts, which suppresses
4029: various parts according to the wishes of the map author. As of this
4030: writing, there is no way to override this parameter, and suppressed
4031: parts will never be returned, nor will their response types or ids be
4032: stored.
4033:
1.217 bowersj2 4034: =head2 Overview
1.51 bowersj2 4035:
1.217 bowersj2 4036: A B<Resource> is the most granular type of object in LON-CAPA that can
4037: be included in a course. It can either be a particular resource, like
4038: an HTML page, external resource, problem, etc., or it can be a
4039: container sequence, such as a "page" or a "map".
4040:
4041: To see a sequence from the user's point of view, please see the
4042: B<Creating a Course: Maps and Sequences> chapter of the Author's
4043: Manual.
4044:
4045: A Resource Object, once obtained from a navmap object via a B<getBy*>
4046: method of the navmap, or from an iterator, allows you to query
4047: information about that resource.
4048:
4049: Generally, you do not ever want to create a resource object yourself,
4050: so creation has been left undocumented. Always retrieve resources
4051: from navmap objects.
4052:
4053: =head3 Identifying Resources
4054:
4055: X<big hash>Every resource is identified by a Resource ID in the big hash that is
4056: unique to that resource for a given course. X<resource ID, in big hash>
4057: The Resource ID has the form #.#, where the first number is the same
4058: for every resource in a map, and the second is unique. For instance,
4059: for a course laid out like this:
4060:
4061: * Problem 1
4062: * Map
4063: * Resource 2
4064: * Resource 3
4065:
4066: C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
4067: C<Resource 3> will share a first number. The second number may end up
4068: re-used between the two groups.
4069:
4070: The resource ID is only used in the big hash, but can be used in the
4071: context of a course to identify a resource easily. (For instance, the
4072: printing system uses it to record which resources from a sequence you
4073: wish to print.)
4074:
4075: X<symb> X<resource, symb>
4076: All resources also have B<symb>s, which uniquely identify a resource
4077: in a course. Many internal LON-CAPA functions expect a symb. A symb
4078: carries along with it the URL of the resource, and the map it appears
1.398 banghart 4079: in. Symbs are much larger than resource IDs.
1.51 bowersj2 4080:
4081: =cut
4082:
4083: sub new {
4084: # magic invocation to create a class instance
4085: my $proto = shift;
4086: my $class = ref($proto) || $proto;
4087: my $self = {};
4088:
1.300 albertel 4089: weaken($self->{NAV_MAP} = shift);
1.51 bowersj2 4090: $self->{ID} = shift;
4091:
1.454 www 4092: $self->{USERNAME} = $self->{NAV_MAP}->{USERNAME};
4093: $self->{DOMAIN} = $self->{NAV_MAP}->{DOMAIN};
4094:
1.51 bowersj2 4095: # Store this new resource in the parent nav map's cache.
4096: $self->{NAV_MAP}->{RESOURCE_CACHE}->{$self->{ID}} = $self;
1.66 bowersj2 4097: $self->{RESOURCE_ERROR} = 0;
1.51 bowersj2 4098:
1.479 raeburn 4099: $self->{DUEDATE_CACHE} = undef;
4100:
1.51 bowersj2 4101: # A hash that can be used by two-pass algorithms to store data
4102: # about this resource in. Not used by the resource object
4103: # directly.
4104: $self->{DATA} = {};
1.508 damieng 4105:
1.51 bowersj2 4106: bless($self);
4107:
1.508 damieng 4108: # This is a speed optimization, to avoid calling symb() too often.
4109: $self->{SYMB} = $self->symb();
1.515 raeburn 4110:
1.51 bowersj2 4111: return $self;
4112: }
4113:
1.70 bowersj2 4114: # private function: simplify the NAV_HASH lookups we keep doing
4115: # pass the name, and to automatically append my ID, pass a true val on the
4116: # second param
4117: sub navHash {
4118: my $self = shift;
4119: my $param = shift;
4120: my $id = shift;
1.441 raeburn 4121: my $arg = $param . ($id?$self->{ID}:"");
1.451 raeburn 4122: if (ref($self) && ref($self->{NAV_MAP}) && defined($arg)) {
1.441 raeburn 4123: return $self->{NAV_MAP}->navhash($arg);
4124: }
4125: return;
1.70 bowersj2 4126: }
4127:
1.51 bowersj2 4128: =pod
4129:
1.217 bowersj2 4130: =head2 Methods
1.70 bowersj2 4131:
1.217 bowersj2 4132: Once you have a resource object, here's what you can do with it:
4133:
4134: =head3 Attribute Retrieval
4135:
4136: Every resource has certain attributes that can be retrieved and used:
1.70 bowersj2 4137:
4138: =over 4
4139:
1.217 bowersj2 4140: =item * B<ID>: Every resource has an ID that is unique for that
4141: resource in the course it is in. The ID is actually in the hash
4142: representing the resource, so for a resource object $res, obtain
4143: it via C<$res->{ID}).
4144:
1.174 albertel 4145: =item * B<compTitle>:
4146:
4147: Returns a "composite title", that is equal to $res->title() if the
4148: resource has a title, and is otherwise the last part of the URL (e.g.,
4149: "problem.problem").
4150:
4151: =item * B<ext>:
4152:
4153: Returns true if the resource is external.
4154:
4155: =item * B<kind>:
4156:
4157: Returns the kind of the resource from the compiled nav map.
4158:
4159: =item * B<randomout>:
1.106 bowersj2 4160:
1.174 albertel 4161: Returns true if this resource was chosen to NOT be shown to the user
4162: by the random map selection feature. In other words, this is usually
4163: false.
1.70 bowersj2 4164:
1.174 albertel 4165: =item * B<randompick>:
1.70 bowersj2 4166:
1.400 albertel 4167: Returns the number of randomly picked items for a map if the randompick
4168: feature is being used on the map.
4169:
4170: =item * B<randomorder>:
4171:
4172: Returns true for a map if the randomorder feature is being used on the
4173: map.
1.70 bowersj2 4174:
1.174 albertel 4175: =item * B<src>:
1.51 bowersj2 4176:
1.174 albertel 4177: Returns the source for the resource.
1.70 bowersj2 4178:
1.174 albertel 4179: =item * B<symb>:
1.70 bowersj2 4180:
1.174 albertel 4181: Returns the symb for the resource.
1.70 bowersj2 4182:
1.174 albertel 4183: =item * B<title>:
1.70 bowersj2 4184:
1.174 albertel 4185: Returns the title of the resource.
4186:
1.51 bowersj2 4187: =back
4188:
4189: =cut
4190:
4191: # These info functions can be used directly, as they don't return
4192: # resource information.
1.85 bowersj2 4193: sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
1.303 albertel 4194: sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
1.70 bowersj2 4195: sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
1.85 bowersj2 4196: sub from { my $self=shift; return $self->navHash("from_", 1); }
1.217 bowersj2 4197: # considered private and undocumented
1.51 bowersj2 4198: sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
4199: sub kind { my $self=shift; return $self->navHash("kind_", 1); }
1.68 bowersj2 4200: sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
4201: sub randompick {
4202: my $self = shift;
1.410 raeburn 4203: my $randompick = $self->parmval('randompick');
4204: return $randompick;
1.68 bowersj2 4205: }
1.400 albertel 4206: sub randomorder {
4207: my $self = shift;
1.410 raeburn 4208: my $randomorder = $self->parmval('randomorder');
4209: return ($randomorder =~ /^yes$/i);
1.400 albertel 4210: }
1.303 albertel 4211: sub link {
4212: my $self=shift;
4213: if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
4214: return $self->src;
4215: }
1.51 bowersj2 4216: sub src {
4217: my $self=shift;
4218: return $self->navHash("src_", 1);
4219: }
1.303 albertel 4220: sub shown_symb {
4221: my $self=shift;
1.508 damieng 4222: if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->{SYMB});}
4223: return $self->{SYMB};
1.303 albertel 4224: }
1.328 www 4225: sub id {
4226: my $self=shift;
4227: return $self->{ID};
4228: }
4229: sub enclosing_map_src {
4230: my $self=shift;
4231: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4232: return $self->navHash('map_id_'.$first);
4233: }
1.51 bowersj2 4234: sub symb {
4235: my $self=shift;
1.523 damieng 4236: if (defined $self->{SYMB}) { return $self->{SYMB}; }
1.51 bowersj2 4237: (my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
4238: my $symbSrc = &Apache::lonnet::declutter($self->src());
1.223 albertel 4239: my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
1.51 bowersj2 4240: . '___' . $second . '___' . $symbSrc;
1.223 albertel 4241: return &Apache::lonnet::symbclean($symb);
1.51 bowersj2 4242: }
1.321 raeburn 4243: sub wrap_symb {
4244: my $self = shift;
1.508 damieng 4245: return $self->{NAV_MAP}->wrap_symb($self->{SYMB});
1.321 raeburn 4246: }
1.213 bowersj2 4247: sub title {
4248: my $self=shift;
4249: if ($self->{ID} eq '0.0') {
4250: # If this is the top-level map, return the title of the course
4251: # since this map can not be titled otherwise.
1.320 albertel 4252: return $env{'course.'.$env{'request.course.id'}.'.description'};
1.213 bowersj2 4253: }
4254: return $self->navHash("title_", 1); }
1.217 bowersj2 4255: # considered private and undocumented
1.70 bowersj2 4256: sub to { my $self=shift; return $self->navHash("to_", 1); }
1.301 albertel 4257: sub condition {
4258: my $self=shift;
4259: my $undercond=$self->navHash("undercond_", 1);
4260: if (!defined($undercond)) { return 1; };
4261: my $condid=$self->navHash("condid_$undercond");
4262: if (!defined($condid)) { return 1; };
4263: my $condition=&Apache::lonnet::directcondval($condid);
4264: return $condition;
4265: }
1.342 albertel 4266: sub condval {
4267: my $self=shift;
1.359 albertel 4268: my ($pathname,$filename) =
4269: &Apache::lonnet::split_uri_for_cond($self->src());
1.342 albertel 4270:
4271: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4272: /\&\Q$filename\E\:([\d\|]+)\&/);
4273: if ($match) {
4274: return &Apache::lonnet::condval($1);
4275: }
4276: return 0;
4277: }
1.106 bowersj2 4278: sub compTitle {
4279: my $self = shift;
4280: my $title = $self->title();
1.176 www 4281: $title=~s/\&colon\;/\:/gs;
1.106 bowersj2 4282: if (!$title) {
4283: $title = $self->src();
4284: $title = substr($title, rindex($title, '/') + 1);
4285: }
4286: return $title;
4287: }
1.399 albertel 4288:
1.70 bowersj2 4289: =pod
4290:
4291: B<Predicate Testing the Resource>
4292:
4293: These methods are shortcuts to deciding if a given resource has a given property.
4294:
4295: =over 4
4296:
1.174 albertel 4297: =item * B<is_map>:
4298:
4299: Returns true if the resource is a map type.
4300:
4301: =item * B<is_problem>:
1.70 bowersj2 4302:
1.174 albertel 4303: Returns true if the resource is a problem type, false
4304: otherwise. (Looks at the extension on the src field; might need more
4305: to work correctly.)
1.70 bowersj2 4306:
1.174 albertel 4307: =item * B<is_page>:
1.70 bowersj2 4308:
1.174 albertel 4309: Returns true if the resource is a page.
4310:
4311: =item * B<is_sequence>:
4312:
4313: Returns true if the resource is a sequence.
1.70 bowersj2 4314:
4315: =back
4316:
4317: =cut
4318:
1.256 albertel 4319: sub hasResource {
4320: my $self = shift;
4321: return $self->{NAV_MAP}->hasResource(@_);
4322: }
4323:
4324: sub retrieveResources {
4325: my $self = shift;
4326: return $self->{NAV_MAP}->retrieveResources(@_);
4327: }
1.70 bowersj2 4328:
1.369 albertel 4329: sub is_exam {
4330: my ($self,$part) = @_;
1.410 raeburn 4331: my $type = $self->parmval('type',$part);
4332: if ($type eq 'exam') {
1.369 albertel 4333: return 1;
4334: }
4335: if ($self->src() =~ /\.(exam)$/) {
4336: return 1;
4337: }
4338: return 0;
4339: }
1.70 bowersj2 4340: sub is_html {
1.51 bowersj2 4341: my $self=shift;
4342: my $src = $self->src();
1.70 bowersj2 4343: return ($src =~ /html$/);
1.51 bowersj2 4344: }
1.70 bowersj2 4345: sub is_map { my $self=shift; return defined($self->navHash("is_map_", 1)); }
4346: sub is_page {
1.51 bowersj2 4347: my $self=shift;
4348: my $src = $self->src();
1.205 bowersj2 4349: return $self->navHash("is_map_", 1) &&
4350: $self->navHash("map_type_" . $self->map_pc()) eq 'page';
1.51 bowersj2 4351: }
1.361 albertel 4352: sub is_practice {
4353: my $self=shift;
4354: my ($part) = @_;
1.410 raeburn 4355: my $type = $self->parmval('type',$part);
4356: if ($type eq 'practice') {
1.361 albertel 4357: return 1;
4358: }
4359: return 0;
4360: }
1.70 bowersj2 4361: sub is_problem {
1.51 bowersj2 4362: my $self=shift;
4363: my $src = $self->src();
1.466 www 4364: if ($src =~ /$LONCAPA::assess_re/) {
1.361 albertel 4365: return !($self->is_practice());
4366: }
4367: return 0;
1.256 albertel 4368: }
1.443 foxr 4369: #
4370: # The has below is the set of status that are considered 'incomplete'
4371: #
4372: my %incomplete_hash =
4373: (
4374: TRIES_LEFT() => 1,
4375: OPEN() => 1,
4376: ATTEMPTED() => 1
4377:
4378: );
4379: #
4380: # Return tru if a problem is incomplete... for now incomplete means that
4381: # any part of the problem is incomplete.
4382: # Note that if the resources is not a problem, 0 is returned.
4383: #
4384: sub is_incomplete {
4385: my $self = shift;
4386: if ($self->is_problem()) {
4387: foreach my $part (@{$self->parts()}) {
4388: if (exists($incomplete_hash{$self->status($part)})) {
4389: return 1;
4390: }
4391: }
4392: }
4393: return 0;
4394:
4395: }
1.413 www 4396: sub is_raw_problem {
4397: my $self=shift;
4398: my $src = $self->src();
1.466 www 4399: if ($src =~ /$LONCAPA::assess_re/) {
1.413 www 4400: return 1;
4401: }
4402: return 0;
4403: }
4404:
1.256 albertel 4405: sub contains_problem {
4406: my $self=shift;
4407: if ($self->is_page()) {
4408: my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
4409: return $hasProblem;
4410: }
4411: return 0;
1.51 bowersj2 4412: }
1.401 albertel 4413: sub map_contains_problem {
4414: my $self=shift;
4415: if ($self->is_map()) {
4416: my $has_problem=
4417: $self->hasResource($self,sub { $_[0]->is_problem() },1);
4418: return $has_problem;
4419: }
4420: return 0;
4421: }
1.70 bowersj2 4422: sub is_sequence {
1.51 bowersj2 4423: my $self=shift;
1.205 bowersj2 4424: return $self->navHash("is_map_", 1) &&
1.426 droeschl 4425: $self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
1.51 bowersj2 4426: }
1.261 matthew 4427: sub is_survey {
4428: my $self = shift();
4429: my $part = shift();
1.410 raeburn 4430: my $type = $self->parmval('type',$part);
1.444 raeburn 4431: if (($type eq 'survey') || ($type eq 'surveycred')) {
1.261 matthew 4432: return 1;
4433: }
1.263 albertel 4434: if ($self->src() =~ /\.(survey)$/) {
1.261 matthew 4435: return 1;
4436: }
4437: return 0;
4438: }
1.444 raeburn 4439: sub is_anonsurvey {
4440: my $self = shift();
4441: my $part = shift();
4442: my $type = $self->parmval('type',$part);
4443: if (($type eq 'anonsurvey') || ($type eq 'anonsurveycred')) {
4444: return 1;
4445: }
4446: return 0;
4447: }
1.360 albertel 4448: sub is_task {
4449: my $self=shift;
4450: my $src = $self->src();
4451: return ($src =~ /\.(task)$/)
4452: }
1.51 bowersj2 4453:
1.266 raeburn 4454: sub is_empty_sequence {
4455: my $self=shift;
4456: my $src = $self->src();
4457: return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
4458: }
4459:
1.101 bowersj2 4460: # Private method: Shells out to the parmval in the nav map, handler parts.
1.51 bowersj2 4461: sub parmval {
4462: my $self = shift;
4463: my $what = shift;
1.185 bowersj2 4464: my $part = shift;
4465: if (!defined($part)) {
4466: $part = '0';
4467: }
1.508 damieng 4468: return $self->{NAV_MAP}->parmval($part.'.'.$what, $self->{SYMB});
1.51 bowersj2 4469: }
4470:
1.70 bowersj2 4471: =pod
4472:
4473: B<Map Methods>
4474:
1.174 albertel 4475: These methods are useful for getting information about the map
4476: properties of the resource, if the resource is a map (B<is_map>).
1.70 bowersj2 4477:
4478: =over 4
4479:
1.174 albertel 4480: =item * B<map_finish>:
4481:
4482: Returns a reference to a resource object corresponding to the finish
4483: resource of the map.
1.70 bowersj2 4484:
1.174 albertel 4485: =item * B<map_pc>:
1.70 bowersj2 4486:
1.174 albertel 4487: Returns the pc value of the map, which is the first number that
4488: appears in the resource ID of the resources in the map, and is the
4489: number that appears around the middle of the symbs of the resources in
4490: that map.
1.70 bowersj2 4491:
1.174 albertel 4492: =item * B<map_start>:
4493:
4494: Returns a reference to a resource object corresponding to the start
4495: resource of the map.
4496:
4497: =item * B<map_type>:
4498:
4499: Returns a string with the type of the map in it.
1.70 bowersj2 4500:
1.497 raeburn 4501: =item * B<map_hierarchy>:
1.448 raeburn 4502:
4503: Returns a string with a comma-separated ordered list of map_pc IDs
4504: for the hierarchy of maps containing a map, with the top level
4505: map first, then descending to deeper levels, with the enclosing map last.
4506:
1.70 bowersj2 4507: =back
1.51 bowersj2 4508:
1.70 bowersj2 4509: =cut
1.51 bowersj2 4510:
4511: sub map_finish {
4512: my $self = shift;
4513: my $src = $self->src();
1.381 albertel 4514: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 4515: my $res = $self->navHash("map_finish_$src", 0);
4516: $res = $self->{NAV_MAP}->getById($res);
4517: return $res;
4518: }
1.70 bowersj2 4519: sub map_pc {
4520: my $self = shift;
1.381 albertel 4521: my $src = $self->src();
1.70 bowersj2 4522: return $self->navHash("map_pc_$src", 0);
4523: }
1.51 bowersj2 4524: sub map_start {
4525: my $self = shift;
4526: my $src = $self->src();
1.381 albertel 4527: $src = &Apache::lonnet::clutter($src);
1.51 bowersj2 4528: my $res = $self->navHash("map_start_$src", 0);
4529: $res = $self->{NAV_MAP}->getById($res);
4530: return $res;
4531: }
4532: sub map_type {
4533: my $self = shift;
4534: my $pc = $self->map_pc();
4535: return $self->navHash("map_type_$pc", 0);
4536: }
1.448 raeburn 4537: sub map_hierarchy {
4538: my $self = shift;
4539: my $pc = $self->map_pc();
4540: return $self->navHash("map_hierarchy_$pc", 0);
4541: }
1.51 bowersj2 4542:
4543: #####
4544: # Property queries
4545: #####
4546:
4547: # These functions will be responsible for returning the CORRECT
4548: # VALUE for the parameter, no matter what. So while they may look
1.398 banghart 4549: # like direct calls to parmval, they can be more than that.
1.51 bowersj2 4550: # So, for instance, the duedate function should use the "duedatetype"
1.398 banghart 4551: # information, rather than the resource object user.
1.51 bowersj2 4552:
4553: =pod
4554:
4555: =head2 Resource Parameters
4556:
1.174 albertel 4557: In order to use the resource parameters correctly, the nav map must
4558: have been instantiated with genCourseAndUserOptions set to true, so
4559: the courseopt and useropt is read correctly. Then, you can call these
4560: functions to get the relevant parameters for the resource. Each
4561: function defaults to part "0", but can be directed to another part by
4562: passing the part as the parameter.
4563:
4564: These methods are responsible for getting the parameter correct, not
4565: merely reflecting the contents of the GDBM hashes. As we move towards
4566: dates relative to other dates, these methods should be updated to
4567: reflect that. (Then, anybody using these methods will not have to update
4568: their code.)
4569:
4570: =over 4
4571:
1.485 foxr 4572:
1.459 foxr 4573: =item * B<printable>
4574:
4575: returns true if the current date is such that the
4576: specified resource part is printable.
4577:
1.485 foxr 4578:
1.459 foxr 4579: =item * B<resprintable>
4580:
4581: Returns true if all parts in the resource are printable making the
4582: entire resource printable.
4583:
4584: =item * B<acc>
1.174 albertel 4585:
4586: Get the Client IP/Name Access Control information.
1.51 bowersj2 4587:
1.174 albertel 4588: =item * B<answerdate>:
1.51 bowersj2 4589:
1.174 albertel 4590: Get the answer-reveal date for the problem.
4591:
1.211 bowersj2 4592: =item * B<awarded>:
4593:
4594: Gets the awarded value for the problem part. Requires genUserData set to
4595: true when the navmap object was created.
4596:
1.174 albertel 4597: =item * B<duedate>:
4598:
4599: Get the due date for the problem.
4600:
4601: =item * B<tries>:
4602:
4603: Get the number of tries the student has used on the problem.
4604:
4605: =item * B<maxtries>:
4606:
4607: Get the number of max tries allowed.
4608:
4609: =item * B<opendate>:
1.51 bowersj2 4610:
1.174 albertel 4611: Get the open date for the problem.
1.51 bowersj2 4612:
1.174 albertel 4613: =item * B<sig>:
1.51 bowersj2 4614:
1.174 albertel 4615: Get the significant figures setting.
1.51 bowersj2 4616:
1.174 albertel 4617: =item * B<tol>:
1.51 bowersj2 4618:
1.174 albertel 4619: Get the tolerance for the problem.
1.51 bowersj2 4620:
1.174 albertel 4621: =item * B<tries>:
1.51 bowersj2 4622:
1.174 albertel 4623: Get the number of tries the user has already used on the problem.
1.51 bowersj2 4624:
1.174 albertel 4625: =item * B<type>:
1.51 bowersj2 4626:
1.174 albertel 4627: Get the question type for the problem.
1.70 bowersj2 4628:
1.174 albertel 4629: =item * B<weight>:
1.51 bowersj2 4630:
1.174 albertel 4631: Get the weight for the problem.
1.51 bowersj2 4632:
4633: =back
4634:
4635: =cut
4636:
1.485 foxr 4637:
4638:
4639:
1.459 foxr 4640: sub printable {
4641:
4642: my ($self, $part) = @_;
4643:
4644: # The following cases apply:
1.487 foxr 4645: # - If a start date is not set, it is replaced by the open date.
4646: # - Ditto for start/open replaced by content open.
4647: # - If neither start nor printdates are set the part is printable.
1.459 foxr 4648: # - Start date set but no end date: Printable if now >= start date.
4649: # - End date set but no start date: Printable if now <= end date.
4650: # - both defined: printable if start <= now <= end
4651: #
1.487 foxr 4652:
4653: # Get the print open/close dates for the resource.
4654:
4655: my $start = $self->parmval("printstartdate", $part);
4656: my $end = $self->parmval("printenddate", $part);
4657:
4658: if (!$start) {
4659: $start = $self->parmval("opendate", $part);
4660: }
4661: if (!$start) {
4662: $start = $self->parmval("contentopen", $part);
4663: }
4664:
4665:
1.459 foxr 4666: my $now = time();
4667:
1.487 foxr 4668:
1.459 foxr 4669: my $startok = 1;
4670: my $endok = 1;
4671:
1.460 foxr 4672: if ((defined $start) && ($start ne '')) {
1.459 foxr 4673: $startok = $start <= $now;
4674: }
1.460 foxr 4675: if ((defined $end) && ($end != '')) {
1.459 foxr 4676: $endok = $end >= $now;
4677: }
4678: return $startok && $endok;
4679: }
4680:
4681: sub resprintable {
4682: my $self = shift;
4683:
4684: # get parts...or realize there are no parts.
4685:
1.460 foxr 4686: my $partsref = $self->parts();
4687: my @parts = @$partsref;
4688:
1.489 raeburn 4689: if (!@parts) {
1.459 foxr 4690: return $self->printable(0);
4691: } else {
1.460 foxr 4692: foreach my $part (@parts) {
4693: if (!$self->printable($part)) {
4694: return 0;
4695: }
1.459 foxr 4696: }
4697: return 1;
4698: }
4699: }
4700:
1.51 bowersj2 4701: sub acc {
4702: (my $self, my $part) = @_;
1.410 raeburn 4703: my $acc = $self->parmval("acc", $part);
4704: return $acc;
1.51 bowersj2 4705: }
4706: sub answerdate {
4707: (my $self, my $part) = @_;
4708: # Handle intervals
1.410 raeburn 4709: my $answerdatetype = $self->parmval("answerdate.type", $part);
4710: my $answerdate = $self->parmval("answerdate", $part);
4711: my $duedate = $self->parmval("duedate", $part);
4712: if ($answerdatetype eq 'date_interval') {
4713: $answerdate = $duedate + $answerdate;
1.51 bowersj2 4714: }
1.410 raeburn 4715: return $answerdate;
1.106 bowersj2 4716: }
1.211 bowersj2 4717: sub awarded {
4718: my $self = shift; my $part = shift;
1.221 bowersj2 4719: $self->{NAV_MAP}->get_user_data();
1.211 bowersj2 4720: if (!defined($part)) { $part = '0'; }
1.508 damieng 4721: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.awarded'};
1.211 bowersj2 4722: }
1.432 raeburn 4723: sub taskversion {
4724: my $self = shift; my $part = shift;
4725: $self->{NAV_MAP}->get_user_data();
4726: if (!defined($part)) { $part = '0'; }
1.508 damieng 4727: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.version'};
1.432 raeburn 4728: }
4729: sub taskstatus {
4730: my $self = shift; my $part = shift;
4731: $self->{NAV_MAP}->get_user_data();
4732: if (!defined($part)) { $part = '0'; }
1.508 damieng 4733: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$self->taskversion($part).'.'.$part.'.status'};
1.432 raeburn 4734: }
4735: sub solved {
4736: my $self = shift; my $part = shift;
4737: $self->{NAV_MAP}->get_user_data();
4738: if (!defined($part)) { $part = '0'; }
1.508 damieng 4739: return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.solved'};
1.432 raeburn 4740: }
4741: sub checkedin {
4742: my $self = shift; my $part = shift;
4743: $self->{NAV_MAP}->get_user_data();
4744: if (!defined($part)) { $part = '0'; }
4745: if ($self->is_task()) {
4746: my $version = $self->taskversion($part);
1.508 damieng 4747: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$version .'.'.$part.'.checkedin.slot'});
1.432 raeburn 4748: } else {
1.508 damieng 4749: return ($self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin'},$self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}}->{'resource.'.$part.'.checkedin.slot'});
1.432 raeburn 4750: }
4751: }
1.382 albertel 4752: # this should work exactly like the copy in lonhomework.pm
1.459 foxr 4753: # Why is there a copy in lonhomework? Why not centralized?
4754: #
4755: # TODO: Centralize duedate.
4756: #
4757:
1.51 bowersj2 4758: sub duedate {
4759: (my $self, my $part) = @_;
1.479 raeburn 4760: if (defined ($self->{DUEDATE_CACHE}->{$part})) {
4761: return $self->{DUEDATE_CACHE}->{$part};
4762: }
1.382 albertel 4763: my $date;
1.406 albertel 4764: my @interval=$self->parmval("interval", $part);
1.382 albertel 4765: my $due_date=$self->parmval("duedate", $part);
1.520 raeburn 4766: if ($interval[0] =~ /^(\d+)/) {
4767: my $timelimit = $1;
4768: my $first_access=&Apache::lonnet::get_first_access($interval[1],
4769: $self->{SYMB});
1.382 albertel 4770: if (defined($first_access)) {
1.520 raeburn 4771: my $interval = $first_access+$timelimit;
1.404 albertel 4772: $date = (!$due_date || $interval < $due_date) ? $interval
4773: : $due_date;
1.382 albertel 4774: } else {
4775: $date = $due_date;
4776: }
4777: } else {
4778: $date = $due_date;
1.260 albertel 4779: }
1.479 raeburn 4780: $self->{DUEDATE_CACHE}->{$part} = $date;
1.382 albertel 4781: return $date;
1.51 bowersj2 4782: }
1.334 albertel 4783: sub handgrade {
4784: (my $self, my $part) = @_;
1.399 albertel 4785: my @response_ids = $self->responseIds($part);
4786: if (@response_ids) {
4787: foreach my $response_id (@response_ids) {
1.410 raeburn 4788: my $handgrade = $self->parmval("handgrade",$part.'_'.$response_id);
4789: if (lc($handgrade) eq 'yes') {
1.399 albertel 4790: return 'yes';
4791: }
4792: }
4793: }
1.410 raeburn 4794: my $handgrade = $self->parmval("handgrade", $part);
4795: return $handgrade;
1.334 albertel 4796: }
1.51 bowersj2 4797: sub maxtries {
4798: (my $self, my $part) = @_;
1.410 raeburn 4799: my $maxtries = $self->parmval("maxtries", $part);
4800: return $maxtries;
1.51 bowersj2 4801: }
4802: sub opendate {
4803: (my $self, my $part) = @_;
1.410 raeburn 4804: my $opendatetype = $self->parmval("opendate.type", $part);
4805: my $opendate = $self->parmval("opendate", $part);
4806: if ($opendatetype eq 'date_interval') {
4807: my $duedate = $self->duedate($part);
4808: $opendate = $duedate - $opendate;
1.51 bowersj2 4809: }
1.410 raeburn 4810: return $opendate;
1.51 bowersj2 4811: }
1.185 bowersj2 4812: sub problemstatus {
4813: (my $self, my $part) = @_;
1.410 raeburn 4814: my $problemstatus = $self->parmval("problemstatus", $part);
4815: return lc($problemstatus);
1.185 bowersj2 4816: }
1.51 bowersj2 4817: sub sig {
4818: (my $self, my $part) = @_;
1.410 raeburn 4819: my $sig = $self->parmval("sig", $part);
4820: return $sig;
1.51 bowersj2 4821: }
4822: sub tol {
4823: (my $self, my $part) = @_;
1.410 raeburn 4824: my $tol = $self->parmval("tol", $part);
4825: return $tol;
1.51 bowersj2 4826: }
1.410 raeburn 4827: sub tries {
1.108 bowersj2 4828: my $self = shift;
4829: my $tries = $self->queryRestoreHash('tries', shift);
4830: if (!defined($tries)) { return '0';}
1.51 bowersj2 4831: return $tries;
4832: }
1.70 bowersj2 4833: sub type {
4834: (my $self, my $part) = @_;
1.410 raeburn 4835: my $type = $self->parmval("type", $part);
4836: return $type;
1.70 bowersj2 4837: }
1.109 bowersj2 4838: sub weight {
4839: my $self = shift; my $part = shift;
1.211 bowersj2 4840: if (!defined($part)) { $part = '0'; }
1.409 raeburn 4841: my $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight',
1.508 damieng 4842: $self->{SYMB}, $self->{DOMAIN},
1.453 www 4843: $self->{USERNAME},
1.409 raeburn 4844: $env{'request.course.sec'});
4845: return $weight;
1.274 matthew 4846: }
4847: sub part_display {
4848: my $self= shift(); my $partID = shift();
4849: if (! defined($partID)) { $partID = '0'; }
4850: my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
1.514 raeburn 4851: $self->{SYMB});
1.274 matthew 4852: if (! defined($display) || $display eq '') {
4853: $display = $partID;
4854: }
4855: return $display;
1.70 bowersj2 4856: }
1.432 raeburn 4857: sub slot_control {
4858: my $self=shift(); my $part = shift();
4859: if (!defined($part)) { $part = '0'; }
4860: my $useslots = $self->parmval("useslots", $part);
4861: my $availablestudent = $self->parmval("availablestudent", $part);
4862: my $available = $self->parmval("available", $part);
4863: return ($useslots,$availablestudent,$available);
4864: }
1.51 bowersj2 4865:
4866: # Multiple things need this
4867: sub getReturnHash {
4868: my $self = shift;
4869:
4870: if (!defined($self->{RETURN_HASH})) {
1.524 damieng 4871: #my %tmpHash = &Apache::lonnet::restore($self->{SYMB},undef,$self->{DOMAIN},$self->{USERNAME});
4872: #$self->{RETURN_HASH} = \%tmpHash;
4873: # When info is retrieved for several resources (as when rendering a directory),
4874: # it is much faster to use the user profile dump and avoid repeated lonnet requests
4875: # (especially since lonnet::currentdump is using Lond directly whenever possible,
4876: # and lonnet::restore is not at this point).
4877: $self->{NAV_MAP}->get_user_data();
4878: $self->{RETURN_HASH} = $self->{NAV_MAP}->{STUDENT_DATA}->{$self->{SYMB}};
1.51 bowersj2 4879: }
4880: }
4881:
4882: ######
4883: # Status queries
4884: ######
4885:
4886: # These methods query the status of problems.
4887:
4888: # If we need to count parts, this function determines the number of
4889: # parts from the metadata. When called, it returns a reference to a list
4890: # of strings corresponding to the parts. (Thus, using it in a scalar context
4891: # tells you how many parts you have in the problem:
4892: # $partcount = scalar($resource->countParts());
4893: # Don't use $self->{PARTS} directly because you don't know if it's been
4894: # computed yet.
4895:
4896: =pod
4897:
4898: =head2 Resource misc
4899:
4900: Misc. functions for the resource.
4901:
4902: =over 4
4903:
1.174 albertel 4904: =item * B<hasDiscussion>:
1.59 bowersj2 4905:
1.174 albertel 4906: Returns a false value if there has been discussion since the user last
4907: logged in, true if there has. Always returns false if the discussion
4908: data was not extracted when the nav map was constructed.
4909:
1.366 albertel 4910: =item * B<last_post_time>:
4911:
4912: Returns a false value if there hasn't been discussion otherwise returns
4913: unix timestamp of last time a discussion posting (or edit) was made.
4914:
1.393 raeburn 4915: =item * B<discussion_info>:
1.366 albertel 4916:
1.393 raeburn 4917: optional argument is a filter (currently can be 'unread');
4918: returns in scalar context the count of the number of discussion postings.
1.366 albertel 4919:
4920: returns in list context both the count of postings and a hash ref
1.393 raeburn 4921: containing information about the postings (subject, id, timestamp) in a hash.
4922:
4923: Default is to return counts for all postings. However if called with a second argument set to 'unread', will return information about only unread postings.
1.366 albertel 4924:
1.174 albertel 4925: =item * B<getFeedback>:
4926:
4927: Gets the feedback for the resource and returns the raw feedback string
4928: for the resource, or the null string if there is no feedback or the
4929: email data was not extracted when the nav map was constructed. Usually
4930: used like this:
1.59 bowersj2 4931:
1.394 raeburn 4932: for my $url (split(/\,/, $res->getFeedback())) {
4933: my $link = &escape($url);
1.59 bowersj2 4934: ...
4935:
4936: and use the link as appropriate.
4937:
4938: =cut
4939:
4940: sub hasDiscussion {
4941: my $self = shift;
1.508 damieng 4942: return $self->{NAV_MAP}->hasDiscussion($self->{SYMB});
1.59 bowersj2 4943: }
4944:
1.366 albertel 4945: sub last_post_time {
4946: my $self = shift;
1.508 damieng 4947: return $self->{NAV_MAP}->last_post_time($self->{SYMB});
1.366 albertel 4948: }
4949:
1.393 raeburn 4950: sub discussion_info {
4951: my ($self,$filter) = @_;
1.508 damieng 4952: return $self->{NAV_MAP}->discussion_info($self->{SYMB},$filter);
1.366 albertel 4953: }
4954:
1.59 bowersj2 4955: sub getFeedback {
4956: my $self = shift;
1.124 bowersj2 4957: my $source = $self->src();
1.508 damieng 4958: my $symb = $self->{SYMB};
1.125 bowersj2 4959: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4960: return $self->{NAV_MAP}->getFeedback($symb,$source);
1.124 bowersj2 4961: }
4962:
4963: sub getErrors {
4964: my $self = shift;
4965: my $source = $self->src();
1.508 damieng 4966: my $symb = $self->{SYMB};
1.124 bowersj2 4967: if ($source =~ /^\/res\//) { $source = substr $source, 5; }
1.395 raeburn 4968: return $self->{NAV_MAP}->getErrors($symb,$source);
1.59 bowersj2 4969: }
4970:
4971: =pod
4972:
1.174 albertel 4973: =item * B<parts>():
1.51 bowersj2 4974:
1.174 albertel 4975: Returns a list reference containing sorted strings corresponding to
1.193 bowersj2 4976: each part of the problem. Single part problems have only a part '0'.
4977: Multipart problems do not return their part '0', since they typically
4978: do not really matter.
1.174 albertel 4979:
4980: =item * B<countParts>():
4981:
4982: Returns the number of parts of the problem a student can answer. Thus,
4983: for single part problems, returns 1. For multipart, it returns the
1.193 bowersj2 4984: number of parts in the problem, not including psuedo-part 0.
1.51 bowersj2 4985:
1.290 matthew 4986: =item * B<countResponses>():
4987:
4988: Returns the total number of responses in the problem a student can answer.
4989:
4990: =item * B<responseTypes>():
4991:
4992: Returns a hash whose keys are the response types. The values are the number
4993: of times each response type is used. This is for the I<entire> problem, not
4994: just a single part.
4995:
1.192 bowersj2 4996: =item * B<multipart>():
4997:
1.193 bowersj2 4998: Returns true if the problem is multipart, false otherwise. Use this instead
4999: of countParts if all you want is multipart/not multipart.
1.192 bowersj2 5000:
1.187 bowersj2 5001: =item * B<responseType>($part):
5002:
5003: Returns the response type of the part, without the word "response" on the
5004: end. Example return values: 'string', 'essay', 'numeric', etc.
5005:
1.193 bowersj2 5006: =item * B<responseIds>($part):
1.187 bowersj2 5007:
1.193 bowersj2 5008: Retreives the response IDs for the given part as an array reference containing
5009: strings naming the response IDs. This may be empty.
1.187 bowersj2 5010:
1.51 bowersj2 5011: =back
5012:
5013: =cut
5014:
5015: sub parts {
5016: my $self = shift;
5017:
1.192 bowersj2 5018: if ($self->ext) { return []; }
1.67 bowersj2 5019:
1.51 bowersj2 5020: $self->extractParts();
5021: return $self->{PARTS};
5022: }
5023:
5024: sub countParts {
5025: my $self = shift;
5026:
5027: my $parts = $self->parts();
1.191 bowersj2 5028:
5029: # If I left this here, then it's not necessary.
5030: #my $delta = 0;
5031: #for my $part (@$parts) {
5032: # if ($part eq '0') { $delta--; }
5033: #}
1.66 bowersj2 5034:
5035: if ($self->{RESOURCE_ERROR}) {
5036: return 0;
5037: }
5038:
1.191 bowersj2 5039: return scalar(@{$parts}); # + $delta;
1.192 bowersj2 5040: }
5041:
1.290 matthew 5042: sub countResponses {
5043: my $self = shift;
5044: my $count;
1.293 matthew 5045: foreach my $part (@{$self->parts()}) {
5046: $count+= scalar($self->responseIds($part));
1.290 matthew 5047: }
5048: return $count;
5049: }
5050:
5051: sub responseTypes {
5052: my $self = shift;
1.291 albertel 5053: my %responses;
1.368 raeburn 5054: foreach my $part (@{$self->parts()}) {
1.290 matthew 5055: foreach my $responsetype ($self->responseType($part)) {
1.291 albertel 5056: $responses{$responsetype}++ if (defined($responsetype));
1.290 matthew 5057: }
5058: }
1.291 albertel 5059: return %responses;
1.290 matthew 5060: }
5061:
1.192 bowersj2 5062: sub multipart {
5063: my $self = shift;
5064: return $self->countParts() > 1;
1.51 bowersj2 5065: }
5066:
1.225 bowersj2 5067: sub singlepart {
5068: my $self = shift;
5069: return $self->countParts() == 1;
5070: }
5071:
1.187 bowersj2 5072: sub responseType {
1.184 bowersj2 5073: my $self = shift;
5074: my $part = shift;
5075:
5076: $self->extractParts();
1.235 albertel 5077: if (defined($self->{RESPONSE_TYPES}->{$part})) {
5078: return @{$self->{RESPONSE_TYPES}->{$part}};
5079: } else {
5080: return undef;
5081: }
1.187 bowersj2 5082: }
5083:
1.193 bowersj2 5084: sub responseIds {
1.187 bowersj2 5085: my $self = shift;
5086: my $part = shift;
5087:
5088: $self->extractParts();
1.235 albertel 5089: if (defined($self->{RESPONSE_IDS}->{$part})) {
5090: return @{$self->{RESPONSE_IDS}->{$part}};
5091: } else {
5092: return undef;
5093: }
1.184 bowersj2 5094: }
5095:
5096: # Private function: Extracts the parts information, both part names and
1.187 bowersj2 5097: # part types, and saves it.
1.51 bowersj2 5098: sub extractParts {
5099: my $self = shift;
5100:
1.153 bowersj2 5101: return if (defined($self->{PARTS}));
1.67 bowersj2 5102: return if ($self->ext);
1.51 bowersj2 5103:
5104: $self->{PARTS} = [];
5105:
1.181 bowersj2 5106: my %parts;
5107:
1.82 bowersj2 5108: # Retrieve part count, if this is a problem
5109: if ($self->is_problem()) {
1.240 albertel 5110: my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
1.152 matthew 5111: my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
1.181 bowersj2 5112:
1.239 bowersj2 5113: if ($partorder) {
5114: my @parts;
5115: for my $part (split (/,/,$partorder)) {
1.508 damieng 5116: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
1.239 bowersj2 5117: push @parts, $part;
1.241 albertel 5118: $parts{$part} = 1;
1.239 bowersj2 5119: }
5120: }
5121: $self->{PARTS} = \@parts;
5122: } else {
5123: if (!$metadata) {
5124: $self->{RESOURCE_ERROR} = 1;
5125: $self->{PARTS} = [];
5126: $self->{PART_TYPE} = {};
5127: return;
5128: }
1.394 raeburn 5129: foreach my $entry (split(/\,/,$metadata)) {
5130: if ($entry =~ /^(?:part|Task)_(.*)$/) {
1.239 bowersj2 5131: my $part = $1;
5132: # This floods the logs if it blows up
5133: if (defined($parts{$part})) {
1.508 damieng 5134: &Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->{SYMB});
1.241 albertel 5135: }
1.239 bowersj2 5136:
5137: # check to see if part is turned off.
5138:
1.508 damieng 5139: if (!Apache::loncommon::check_if_partid_hidden($part, $self->{SYMB})) {
1.239 bowersj2 5140: $parts{$part} = 1;
5141: }
5142: }
5143: }
1.504 raeburn 5144: my @sortedParts = sort(keys(%parts));
1.239 bowersj2 5145: $self->{PARTS} = \@sortedParts;
1.51 bowersj2 5146: }
1.82 bowersj2 5147:
1.187 bowersj2 5148:
1.284 matthew 5149: # These hashes probably do not need names that end with "Hash"....
1.187 bowersj2 5150: my %responseIdHash;
5151: my %responseTypeHash;
5152:
1.189 bowersj2 5153:
5154: # Init the responseIdHash
1.394 raeburn 5155: foreach my $part (@{$self->{PARTS}}) {
5156: $responseIdHash{$part} = [];
1.189 bowersj2 5157: }
5158:
1.187 bowersj2 5159: # Now, the unfortunate thing about this is that parts, part name, and
1.239 bowersj2 5160: # response id are delimited by underscores, but both the part
1.187 bowersj2 5161: # name and response id can themselves have underscores in them.
5162: # So we have to use our knowlege of part names to figure out
5163: # where the part names begin and end, and even then, it is possible
5164: # to construct ambiguous situations.
1.504 raeburn 5165: foreach my $data (split(/,/, $metadata)) {
1.379 albertel 5166: if ($data =~ /^([a-zA-Z]+)response_(.*)/
5167: || $data =~ /^(Task)_(.*)/) {
1.187 bowersj2 5168: my $responseType = $1;
5169: my $partStuff = $2;
5170: my $partIdSoFar = '';
1.504 raeburn 5171: my @partChunks = split(/_/, $partStuff);
1.187 bowersj2 5172: my $i = 0;
5173: for ($i = 0; $i < scalar(@partChunks); $i++) {
5174: if ($partIdSoFar) { $partIdSoFar .= '_'; }
5175: $partIdSoFar .= $partChunks[$i];
5176: if ($parts{$partIdSoFar}) {
5177: my @otherChunks = @partChunks[$i+1..$#partChunks];
5178: my $responseId = join('_', @otherChunks);
1.379 albertel 5179: if ($self->is_task()) {
5180: push(@{$responseIdHash{$partIdSoFar}},
5181: $partIdSoFar);
5182: } else {
5183: push(@{$responseIdHash{$partIdSoFar}},
5184: $responseId);
5185: }
5186: push(@{$responseTypeHash{$partIdSoFar}},
5187: $responseType);
1.187 bowersj2 5188: }
5189: }
5190: }
5191: }
1.264 albertel 5192: my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
1.284 matthew 5193: #
5194: # Reorder the arrays in the %responseIdHash and %responseTypeHash
1.264 albertel 5195: if ($resorder) {
5196: my @resorder=split(/,/,$resorder);
5197: foreach my $part (keys(%responseIdHash)) {
1.286 albertel 5198: my $i=0;
5199: my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
1.264 albertel 5200: my @neworder;
5201: foreach my $possibleid (@resorder) {
5202: if (exists($resids{$possibleid})) {
1.286 albertel 5203: push(@neworder,$resids{$possibleid});
1.264 albertel 5204: }
5205: }
1.286 albertel 5206: my @ids;
5207: my @type;
5208: foreach my $element (@neworder) {
5209: push (@ids,$responseIdHash{$part}->[$element]);
5210: push (@type,$responseTypeHash{$part}->[$element]);
5211: }
5212: $responseIdHash{$part}=\@ids;
5213: $responseTypeHash{$part}=\@type;
1.264 albertel 5214: }
5215: }
1.187 bowersj2 5216: $self->{RESPONSE_IDS} = \%responseIdHash;
5217: $self->{RESPONSE_TYPES} = \%responseTypeHash;
1.154 bowersj2 5218: }
5219:
1.51 bowersj2 5220: return;
5221: }
5222:
5223: =pod
5224:
5225: =head2 Resource Status
5226:
1.174 albertel 5227: Problem resources have status information, reflecting their various
5228: dates and completion statuses.
1.51 bowersj2 5229:
1.174 albertel 5230: There are two aspects to the status: the date-related information and
5231: the completion information.
1.51 bowersj2 5232:
1.174 albertel 5233: Idiomatic usage of these two methods would probably look something
5234: like
1.51 bowersj2 5235:
1.394 raeburn 5236: foreach my $part ($resource->parts()) {
5237: my $dateStatus = $resource->getDateStatus($part);
5238: my $completionStatus = $resource->getCompletionStatus($part);
1.51 bowersj2 5239:
1.70 bowersj2 5240: or
5241:
1.394 raeburn 5242: my $status = $resource->status($part);
1.70 bowersj2 5243:
1.51 bowersj2 5244: ... use it here ...
5245: }
5246:
1.174 albertel 5247: Which you use depends on exactly what you are looking for. The
5248: status() function has been optimized for the nav maps display and may
5249: not precisely match what you need elsewhere.
1.101 bowersj2 5250:
1.174 albertel 5251: The symbolic constants shown below can be accessed through the
5252: resource object: C<$res->OPEN>.
1.101 bowersj2 5253:
1.51 bowersj2 5254: =over 4
5255:
1.174 albertel 5256: =item * B<getDateStatus>($part):
5257:
5258: ($part defaults to 0). A convenience function that returns a symbolic
5259: constant telling you about the date status of the part. The possible
5260: return values are:
1.51 bowersj2 5261:
5262: =back
5263:
5264: B<Date Codes>
5265:
5266: =over 4
5267:
1.174 albertel 5268: =item * B<OPEN_LATER>:
5269:
5270: The problem will be opened later.
5271:
5272: =item * B<OPEN>:
5273:
5274: Open and not yet due.
5275:
1.51 bowersj2 5276:
1.174 albertel 5277: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 5278:
1.174 albertel 5279: The due date has passed, but the answer date has not yet arrived.
1.59 bowersj2 5280:
1.174 albertel 5281: =item * B<PAST_DUE_NO_ANSWER>:
1.54 bowersj2 5282:
1.174 albertel 5283: The due date has passed and there is no answer opening date set.
1.51 bowersj2 5284:
1.174 albertel 5285: =item * B<ANSWER_OPEN>:
1.51 bowersj2 5286:
1.174 albertel 5287: The answer date is here.
5288:
5289: =item * B<NETWORK_FAILURE>:
5290:
5291: The information is unknown due to network failure.
1.51 bowersj2 5292:
5293: =back
5294:
5295: =cut
5296:
5297: # Apparently the compiler optimizes these into constants automatically
1.54 bowersj2 5298: sub OPEN_LATER { return 0; }
5299: sub OPEN { return 1; }
5300: sub PAST_DUE_NO_ANSWER { return 2; }
5301: sub PAST_DUE_ANSWER_LATER { return 3; }
5302: sub ANSWER_OPEN { return 4; }
1.432 raeburn 5303: sub NOTHING_SET { return 5; }
1.54 bowersj2 5304: sub NETWORK_FAILURE { return 100; }
5305:
5306: # getDateStatus gets the date status for a given problem part.
5307: # Because answer date, due date, and open date are fully independent
5308: # (i.e., it is perfectly possible to *only* have an answer date),
5309: # we have to completely cover the 3x3 maxtrix of (answer, due, open) x
5310: # (past, future, none given). This function handles this with a decision
5311: # tree. Read the comments to follow the decision tree.
1.51 bowersj2 5312:
5313: sub getDateStatus {
5314: my $self = shift;
5315: my $part = shift;
5316: $part = "0" if (!defined($part));
1.54 bowersj2 5317:
5318: # Always return network failure if there was one.
1.51 bowersj2 5319: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5320:
5321: my $now = time();
5322:
1.53 bowersj2 5323: my $open = $self->opendate($part);
5324: my $due = $self->duedate($part);
5325: my $answer = $self->answerdate($part);
5326:
5327: if (!$open && !$due && !$answer) {
5328: # no data on the problem at all
5329: # should this be the same as "open later"? think multipart.
5330: return $self->NOTHING_SET;
5331: }
1.59 bowersj2 5332: if (!$open || $now < $open) {return $self->OPEN_LATER}
5333: if (!$due || $now < $due) {return $self->OPEN}
5334: if ($answer && $now < $answer) {return $self->PAST_DUE_ANSWER_LATER}
5335: if ($answer) { return $self->ANSWER_OPEN; }
1.54 bowersj2 5336: return PAST_DUE_NO_ANSWER;
1.51 bowersj2 5337: }
5338:
5339: =pod
5340:
5341: B<>
5342:
5343: =over 4
5344:
1.174 albertel 5345: =item * B<getCompletionStatus>($part):
1.51 bowersj2 5346:
1.174 albertel 5347: ($part defaults to 0.) A convenience function that returns a symbolic
5348: constant telling you about the completion status of the part, with the
5349: following possible results:
5350:
5351: =back
1.51 bowersj2 5352:
5353: B<Completion Codes>
5354:
5355: =over 4
5356:
1.174 albertel 5357: =item * B<NOT_ATTEMPTED>:
5358:
5359: Has not been attempted at all.
5360:
5361: =item * B<INCORRECT>:
5362:
5363: Attempted, but wrong by student.
1.51 bowersj2 5364:
1.174 albertel 5365: =item * B<INCORRECT_BY_OVERRIDE>:
1.51 bowersj2 5366:
1.174 albertel 5367: Attempted, but wrong by instructor override.
1.51 bowersj2 5368:
1.174 albertel 5369: =item * B<CORRECT>:
1.51 bowersj2 5370:
1.174 albertel 5371: Correct or correct by instructor.
1.51 bowersj2 5372:
1.174 albertel 5373: =item * B<CORRECT_BY_OVERRIDE>:
1.51 bowersj2 5374:
1.174 albertel 5375: Correct by instructor override.
1.51 bowersj2 5376:
1.174 albertel 5377: =item * B<EXCUSED>:
5378:
5379: Excused. Not yet implemented.
5380:
5381: =item * B<NETWORK_FAILURE>:
5382:
5383: Information not available due to network failure.
5384:
5385: =item * B<ATTEMPTED>:
5386:
5387: Attempted, and not yet graded.
1.69 bowersj2 5388:
1.450 raeburn 5389: =item * B<CREDIT_ATTEMPTED>:
5390:
5391: Attempted, and credit received for attempt (survey and anonymous survey only).
5392:
1.51 bowersj2 5393: =back
5394:
5395: =cut
5396:
1.53 bowersj2 5397: sub NOT_ATTEMPTED { return 10; }
5398: sub INCORRECT { return 11; }
5399: sub INCORRECT_BY_OVERRIDE { return 12; }
5400: sub CORRECT { return 13; }
5401: sub CORRECT_BY_OVERRIDE { return 14; }
5402: sub EXCUSED { return 15; }
1.69 bowersj2 5403: sub ATTEMPTED { return 16; }
1.450 raeburn 5404: sub CREDIT_ATTEMPTED { return 17; }
1.51 bowersj2 5405:
5406: sub getCompletionStatus {
5407: my $self = shift;
1.332 albertel 5408: my $part = shift;
1.51 bowersj2 5409: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5410:
1.332 albertel 5411: my $status = $self->queryRestoreHash('solved', $part);
1.51 bowersj2 5412:
1.251 www 5413: # Left as separate if statements in case we ever do more with this
1.51 bowersj2 5414: if ($status eq 'correct_by_student') {return $self->CORRECT;}
1.288 albertel 5415: if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
1.332 albertel 5416: if ($status eq 'correct_by_override') {
5417: return $self->CORRECT_BY_OVERRIDE;
5418: }
1.51 bowersj2 5419: if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
5420: if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
5421: if ($status eq 'excused') {return $self->EXCUSED; }
1.69 bowersj2 5422: if ($status eq 'ungraded_attempted') {return $self->ATTEMPTED; }
1.450 raeburn 5423: if ($status eq 'credit_attempted') {
5424: if ($self->is_anonsurvey($part) || $self->is_survey($part)) {
5425: return $self->CREDIT_ATTEMPTED;
5426: } else {
5427: return $self->ATTEMPTED;
5428: }
5429: }
1.51 bowersj2 5430: return $self->NOT_ATTEMPTED;
1.108 bowersj2 5431: }
5432:
5433: sub queryRestoreHash {
5434: my $self = shift;
5435: my $hashentry = shift;
5436: my $part = shift;
1.185 bowersj2 5437: $part = "0" if (!defined($part) || $part eq '');
1.108 bowersj2 5438: return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});
5439:
5440: $self->getReturnHash();
5441:
5442: return $self->{RETURN_HASH}->{'resource.'.$part.'.'.$hashentry};
1.51 bowersj2 5443: }
5444:
5445: =pod
5446:
5447: B<Composite Status>
5448:
1.174 albertel 5449: Along with directly returning the date or completion status, the
5450: resource object includes a convenience function B<status>() that will
5451: combine the two status tidbits into one composite status that can
1.191 bowersj2 5452: represent the status of the resource as a whole. This method represents
5453: the concept of the thing we want to display to the user on the nav maps
5454: screen, which is a combination of completion and open status. The precise logic is
1.174 albertel 5455: documented in the comments of the status method. The following results
5456: may be returned, all available as methods on the resource object
1.185 bowersj2 5457: ($res->NETWORK_FAILURE): In addition to the return values that match
5458: the date or completion status, this function can return "ANSWER_SUBMITTED"
5459: if that problemstatus parameter value is set to No, suppressing the
5460: incorrect/correct feedback.
1.51 bowersj2 5461:
5462: =over 4
5463:
1.174 albertel 5464: =item * B<NETWORK_FAILURE>:
5465:
5466: The network has failed and the information is not available.
1.51 bowersj2 5467:
1.174 albertel 5468: =item * B<NOTHING_SET>:
1.53 bowersj2 5469:
1.174 albertel 5470: No dates have been set for this problem (part) at all. (Because only
5471: certain parts of a multi-part problem may be assigned, this can not be
5472: collapsed into "open later", as we do not know a given part will EVER
5473: be opened. For single part, this is the same as "OPEN_LATER".)
1.51 bowersj2 5474:
1.174 albertel 5475: =item * B<CORRECT>:
1.51 bowersj2 5476:
1.174 albertel 5477: For any reason at all, the part is considered correct.
1.54 bowersj2 5478:
1.174 albertel 5479: =item * B<EXCUSED>:
1.51 bowersj2 5480:
1.174 albertel 5481: For any reason at all, the problem is excused.
1.51 bowersj2 5482:
1.174 albertel 5483: =item * B<PAST_DUE_NO_ANSWER>:
1.51 bowersj2 5484:
1.174 albertel 5485: The problem is past due, not considered correct, and no answer date is
5486: set.
1.51 bowersj2 5487:
1.174 albertel 5488: =item * B<PAST_DUE_ANSWER_LATER>:
1.51 bowersj2 5489:
1.174 albertel 5490: The problem is past due, not considered correct, and an answer date in
5491: the future is set.
1.51 bowersj2 5492:
1.174 albertel 5493: =item * B<ANSWER_OPEN>:
5494:
5495: The problem is past due, not correct, and the answer is now available.
5496:
5497: =item * B<OPEN_LATER>:
5498:
5499: The problem is not yet open.
5500:
5501: =item * B<TRIES_LEFT>:
5502:
5503: The problem is open, has been tried, is not correct, but there are
5504: tries left.
5505:
5506: =item * B<INCORRECT>:
5507:
5508: The problem is open, and all tries have been used without getting the
5509: correct answer.
5510:
5511: =item * B<OPEN>:
5512:
5513: The item is open and not yet tried.
5514:
5515: =item * B<ATTEMPTED>:
5516:
5517: The problem has been attempted.
1.69 bowersj2 5518:
1.450 raeburn 5519: =item * B<CREDIT_ATTEMPTED>:
5520:
5521: The problem has been attempted, and credit given for the attempt (survey and anonymous survey only).
5522:
1.185 bowersj2 5523: =item * B<ANSWER_SUBMITTED>:
5524:
5525: An answer has been submitted, but the student should not see it.
5526:
1.51 bowersj2 5527: =back
5528:
5529: =cut
5530:
1.432 raeburn 5531: sub TRIES_LEFT { return 20; }
5532: sub ANSWER_SUBMITTED { return 21; }
5533: sub PARTIALLY_CORRECT { return 22; }
5534:
5535: sub RESERVED_LATER { return 30; }
5536: sub RESERVED { return 31; }
5537: sub RESERVED_LOCATION { return 32; }
5538: sub RESERVABLE { return 33; }
5539: sub RESERVABLE_LATER { return 34; }
5540: sub NOTRESERVABLE { return 35; }
5541: sub NOT_IN_A_SLOT { return 36; }
5542: sub NEEDS_CHECKIN { return 37; }
5543: sub WAITING_FOR_GRADE { return 38; }
5544: sub UNKNOWN { return 39; }
1.51 bowersj2 5545:
5546: sub status {
5547: my $self = shift;
5548: my $part = shift;
5549: if (!defined($part)) { $part = "0"; }
5550: my $completionStatus = $self->getCompletionStatus($part);
5551: my $dateStatus = $self->getDateStatus($part);
5552:
5553: # What we have is a two-dimensional matrix with 4 entries on one
5554: # dimension and 5 entries on the other, which we want to colorize,
1.54 bowersj2 5555: # plus network failure and "no date data at all".
1.51 bowersj2 5556:
1.222 bowersj2 5557: #if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
1.53 bowersj2 5558: if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }
1.51 bowersj2 5559:
1.408 raeburn 5560: my $suppressFeedback = 0;
5561: if (($self->problemstatus($part) eq 'no') ||
5562: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5563: $suppressFeedback = 1;
5564: }
1.236 bowersj2 5565: # If there's an answer date and we're past it, don't
5566: # suppress the feedback; student should know
1.330 albertel 5567: if ($self->duedate($part) && $self->duedate($part) < time() &&
5568: $self->answerdate($part) && $self->answerdate($part) < time()) {
1.236 bowersj2 5569: $suppressFeedback = 0;
5570: }
1.185 bowersj2 5571:
1.51 bowersj2 5572: # There are a few whole rows we can dispose of:
1.53 bowersj2 5573: if ($completionStatus == CORRECT ||
5574: $completionStatus == CORRECT_BY_OVERRIDE ) {
1.332 albertel 5575: if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
5576: my $awarded=$self->awarded($part);
5577: if ($awarded < 1 && $awarded > 0) {
5578: return PARTIALLY_CORRECT;
5579: } elsif ($awarded<1) {
5580: return INCORRECT;
5581: }
5582: return CORRECT;
1.69 bowersj2 5583: }
5584:
1.343 albertel 5585: # If it's WRONG... and not open
5586: if ( ($completionStatus == INCORRECT ||
5587: $completionStatus == INCORRECT_BY_OVERRIDE)
5588: && (!$self->opendate($part) || $self->opendate($part) > time()) ) {
5589: return INCORRECT;
5590: }
5591:
1.69 bowersj2 5592: if ($completionStatus == ATTEMPTED) {
5593: return ATTEMPTED;
1.53 bowersj2 5594: }
5595:
1.450 raeburn 5596: if ($completionStatus == CREDIT_ATTEMPTED) {
5597: return CREDIT_ATTEMPTED;
5598: }
5599:
1.53 bowersj2 5600: # If it's EXCUSED, then return that no matter what
5601: if ($completionStatus == EXCUSED) {
5602: return EXCUSED;
1.51 bowersj2 5603: }
5604:
1.53 bowersj2 5605: if ($dateStatus == NOTHING_SET) {
5606: return NOTHING_SET;
1.51 bowersj2 5607: }
5608:
1.69 bowersj2 5609: # Now we're down to a 4 (incorrect, incorrect_override, not_attempted)
5610: # by 4 matrix (date statuses).
1.51 bowersj2 5611:
1.54 bowersj2 5612: if ($dateStatus == PAST_DUE_ANSWER_LATER ||
1.59 bowersj2 5613: $dateStatus == PAST_DUE_NO_ANSWER ) {
1.272 albertel 5614: return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
1.51 bowersj2 5615: }
5616:
1.53 bowersj2 5617: if ($dateStatus == ANSWER_OPEN) {
5618: return ANSWER_OPEN;
1.51 bowersj2 5619: }
5620:
5621: # Now: (incorrect, incorrect_override, not_attempted) x
5622: # (open_later), (open)
5623:
1.53 bowersj2 5624: if ($dateStatus == OPEN_LATER) {
5625: return OPEN_LATER;
1.51 bowersj2 5626: }
5627:
5628: # If it's WRONG...
1.53 bowersj2 5629: if ($completionStatus == INCORRECT || $completionStatus == INCORRECT_BY_OVERRIDE) {
1.51 bowersj2 5630: # and there are TRIES LEFT:
1.79 bowersj2 5631: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
1.222 bowersj2 5632: return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
1.51 bowersj2 5633: }
1.185 bowersj2 5634: return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
1.51 bowersj2 5635: }
5636:
5637: # Otherwise, it's untried and open
1.473 raeburn 5638: return OPEN;
1.224 bowersj2 5639: }
5640:
1.432 raeburn 5641: sub check_for_slot {
5642: my $self = shift;
5643: my $part = shift;
1.508 damieng 5644: my $symb = $self->{SYMB};
1.432 raeburn 5645: my ($use_slots,$available,$availablestudent) = $self->slot_control($part);
5646: if (($use_slots ne '') && ($use_slots !~ /^\s*no\s*$/i)) {
5647: my @slots = (split(/:/,$availablestudent),split(/:/,$available));
5648: my $cid=$env{'request.course.id'};
5649: my $cdom=$env{'course.'.$cid.'.domain'};
5650: my $cnum=$env{'course.'.$cid.'.num'};
5651: my $now = time;
1.473 raeburn 5652: my $num_usable_slots = 0;
1.522 raeburn 5653: my ($checkedin,$checkedinslot,%consumed_uniq,%slots);
1.432 raeburn 5654: if (@slots > 0) {
1.522 raeburn 5655: %slots=&Apache::lonnet::get('slots',[@slots],$cdom,$cnum);
1.432 raeburn 5656: if (&Apache::lonnet::error(%slots)) {
5657: return (UNKNOWN);
5658: }
1.473 raeburn 5659: my @sorted_slots = &Apache::loncommon::sorted_slots(\@slots,\%slots,'starttime');
1.432 raeburn 5660: foreach my $slot_name (@sorted_slots) {
1.473 raeburn 5661: next if (!defined($slots{$slot_name}) || !ref($slots{$slot_name}));
1.432 raeburn 5662: my $end = $slots{$slot_name}->{'endtime'};
5663: my $start = $slots{$slot_name}->{'starttime'};
5664: my $ip = $slots{$slot_name}->{'ip'};
5665: if ($self->simpleStatus() == OPEN) {
5666: if ($end > $now) {
1.473 raeburn 5667: if ($start > $now) {
5668: return (RESERVED_LATER,$start,$slot_name);
5669: } else {
5670: if ($ip ne '') {
5671: if (!&Apache::loncommon::check_ip_acc($ip)) {
1.503 raeburn 5672: return (RESERVED_LOCATION,$end,$slot_name);
1.432 raeburn 5673: }
5674: }
1.473 raeburn 5675: my @proctors;
5676: if ($slots{$slot_name}->{'proctor'} ne '') {
5677: @proctors = split(',',$slots{$slot_name}->{'proctor'});
5678: }
5679: if (@proctors > 0) {
5680: ($checkedin,$checkedinslot) = $self->checkedin();
5681: unless ((grep(/^\Q$checkedin\E/,@proctors)) &&
5682: ($checkedinslot eq $slot_name)) {
5683: return (NEEDS_CHECKIN,undef,$slot_name);
1.472 raeburn 5684: }
1.432 raeburn 5685: }
1.473 raeburn 5686: return (RESERVED,$end,$slot_name);
1.432 raeburn 5687: }
5688: }
1.473 raeburn 5689: } elsif ($end > $now) {
5690: $num_usable_slots ++;
1.432 raeburn 5691: }
5692: }
1.522 raeburn 5693: my ($is_correct,$wait_for_grade);
1.432 raeburn 5694: if ($self->is_task()) {
5695: my $taskstatus = $self->taskstatus();
5696: $is_correct = (($taskstatus eq 'pass') ||
5697: ($self->solved() =~ /^correct_/));
1.522 raeburn 5698: unless ($taskstatus =~ /^(?:pass|fail)$/) {
5699: $wait_for_grade = 1;
5700: }
1.432 raeburn 5701: } else {
1.522 raeburn 5702: unless ($self->completable()) {
5703: $wait_for_grade = 1;
5704: }
5705: unless (($self->problemstatus($part) eq 'no') ||
5706: ($self->problemstatus($part) eq 'no_feedback_ever')) {
5707: $is_correct = ($self->solved($part) =~ /^correct_/);
5708: $wait_for_grade = 0;
5709: }
1.432 raeburn 5710: }
5711: ($checkedin,$checkedinslot) = $self->checkedin();
5712: if ($checkedin) {
1.522 raeburn 5713: if (ref($slots{$checkedinslot}) eq 'HASH') {
5714: $consumed_uniq{$checkedinslot} = $slots{$checkedinslot}{'uniqueperiod'};
5715: }
5716: if ($wait_for_grade) {
1.432 raeburn 5717: return (WAITING_FOR_GRADE);
5718: } elsif ($is_correct) {
5719: return (CORRECT);
5720: }
5721: }
1.473 raeburn 5722: if ($num_usable_slots) {
5723: return(NOT_IN_A_SLOT);
5724: }
5725: }
5726: my $reservable = &Apache::lonnet::get_reservable_slots($cnum,$cdom,$env{'user.name'},
5727: $env{'user.domain'});
5728: if (ref($reservable) eq 'HASH') {
1.511 raeburn 5729: my ($map) = &Apache::lonnet::decode_symb($symb);
1.473 raeburn 5730: if ((ref($reservable->{'now_order'}) eq 'ARRAY') && (ref($reservable->{'now'}) eq 'HASH')) {
1.474 raeburn 5731: foreach my $slot (reverse (@{$reservable->{'now_order'}})) {
1.510 raeburn 5732: my $canuse;
5733: if ($reservable->{'now'}{$slot}{'symb'} eq '') {
5734: $canuse = 1;
5735: } else {
5736: my %oksymbs;
5737: my @slotsymbs = split(/\s*,\s*/,$reservable->{'now'}{$slot}{'symb'});
5738: map { $oksymbs{$_} = 1; } @slotsymbs;
5739: if ($oksymbs{$symb}) {
5740: $canuse = 1;
5741: } else {
5742: foreach my $item (@slotsymbs) {
5743: if ($item =~ /\.(page|sequence)$/) {
5744: (undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
5745: if (($map ne '') && ($map eq $sloturl)) {
5746: $canuse = 1;
5747: last;
5748: }
5749: }
5750: }
5751: }
5752: }
5753: if ($canuse) {
1.522 raeburn 5754: if ($checkedin) {
5755: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5756: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5757: if ($reservable->{'now'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5758: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5759: next if (!
5760: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5761: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5762: }
5763: }
5764: }
1.473 raeburn 5765: return(RESERVABLE,$reservable->{'now'}{$slot}{'endreserve'});
5766: }
5767: }
1.432 raeburn 5768: }
1.473 raeburn 5769: if ((ref($reservable->{'future_order'}) eq 'ARRAY') && (ref($reservable->{'future'}) eq 'HASH')) {
1.474 raeburn 5770: foreach my $slot (@{$reservable->{'future_order'}}) {
1.510 raeburn 5771: my $canuse;
5772: if ($reservable->{'future'}{$slot}{'symb'} eq '') {
5773: $canuse = 1;
5774: } elsif ($reservable->{'future'}{$slot}{'symb'} =~ /,/) {
5775: my %oksymbs;
5776: my @slotsymbs = split(/\s*,\s*/,$reservable->{'future'}{$slot}{'symb'});
5777: map { $oksymbs{$_} = 1; } @slotsymbs;
5778: if ($oksymbs{$symb}) {
5779: $canuse = 1;
5780: } else {
5781: foreach my $item (@slotsymbs) {
5782: if ($item =~ /\.(page|sequence)$/) {
5783: (undef,undef, my $sloturl) = &Apache::lonnet::decode_symb($item);
5784: if (($map ne '') && ($map eq $sloturl)) {
5785: $canuse = 1;
5786: last;
5787: }
5788: }
5789: }
5790: }
5791: } elsif ($reservable->{'future'}{$slot}{'symb'} eq $symb) {
5792: $canuse = 1;
5793: }
5794: if ($canuse) {
1.522 raeburn 5795: if ($checkedin) {
5796: if (ref($consumed_uniq{$checkedinslot}) eq 'ARRAY') {
5797: my ($uniqstart,$uniqend)=@{$consumed_uniq{$checkedinslot}};
5798: if ($reservable->{'future'}{$slot}{'uniqueperiod'} =~ /^(\d+),(\d+)$/) {
5799: my ($new_uniq_start,$new_uniq_end) = ($1,$2);
5800: next if (!
5801: ($uniqstart < $new_uniq_start && $uniqend < $new_uniq_start) ||
5802: ($uniqstart > $new_uniq_end && $uniqend > $new_uniq_end ));
5803: }
5804: }
5805: }
1.473 raeburn 5806: return(RESERVABLE_LATER,$reservable->{'future'}{$slot}{'startreserve'});
5807: }
5808: }
1.432 raeburn 5809: }
5810: }
1.473 raeburn 5811: return(NOTRESERVABLE);
1.432 raeburn 5812: }
5813: return;
5814: }
5815:
1.224 bowersj2 5816: sub CLOSED { return 23; }
5817: sub ERROR { return 24; }
5818:
5819: =pod
5820:
5821: B<Simple Status>
5822:
5823: Convenience method B<simpleStatus> provides a "simple status" for the resource.
5824: "Simple status" corresponds to "which icon is shown on the
5825: Navmaps". There are six "simple" statuses:
5826:
5827: =over 4
5828:
5829: =item * B<CLOSED>: The problem is currently closed. (No icon shown.)
5830:
5831: =item * B<OPEN>: The problem is open and unattempted.
5832:
5833: =item * B<CORRECT>: The problem is correct for any reason.
5834:
5835: =item * B<INCORRECT>: The problem is incorrect and can still be
5836: completed successfully.
5837:
5838: =item * B<ATTEMPTED>: The problem has been attempted, but the student
5839: does not know if they are correct. (The ellipsis icon.)
5840:
5841: =item * B<ERROR>: There is an error retrieving information about this
5842: problem.
5843:
5844: =back
5845:
5846: =cut
5847:
5848: # This hash maps the composite status to this simple status, and
5849: # can be used directly, if you like
5850: my %compositeToSimple =
5851: (
5852: NETWORK_FAILURE() => ERROR,
5853: NOTHING_SET() => CLOSED,
5854: CORRECT() => CORRECT,
1.332 albertel 5855: PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
1.224 bowersj2 5856: EXCUSED() => CORRECT,
5857: PAST_DUE_NO_ANSWER() => INCORRECT,
5858: PAST_DUE_ANSWER_LATER() => INCORRECT,
5859: ANSWER_OPEN() => INCORRECT,
5860: OPEN_LATER() => CLOSED,
5861: TRIES_LEFT() => OPEN,
5862: INCORRECT() => INCORRECT,
5863: OPEN() => OPEN,
5864: ATTEMPTED() => ATTEMPTED,
1.450 raeburn 5865: CREDIT_ATTEMPTED() => CORRECT,
1.224 bowersj2 5866: ANSWER_SUBMITTED() => ATTEMPTED
5867: );
5868:
5869: sub simpleStatus {
5870: my $self = shift;
5871: my $part = shift;
5872: my $status = $self->status($part);
5873: return $compositeToSimple{$status};
1.225 bowersj2 5874: }
5875:
5876: =pod
5877:
5878: B<simpleStatusCount> will return an array reference containing, in
5879: this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
5880: and ERROR parts the given problem has.
5881:
5882: =cut
5883:
5884: # This maps the status to the slot we want to increment
5885: my %statusToSlotMap =
5886: (
5887: OPEN() => 0,
5888: CLOSED() => 1,
5889: CORRECT() => 2,
5890: INCORRECT() => 3,
5891: ATTEMPTED() => 4,
5892: ERROR() => 5
5893: );
5894:
5895: sub statusToSlot { return $statusToSlotMap{shift()}; }
5896:
5897: sub simpleStatusCount {
5898: my $self = shift;
5899:
5900: my @counts = (0, 0, 0, 0, 0, 0, 0);
5901: foreach my $part (@{$self->parts()}) {
5902: $counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
5903: }
5904:
5905: return \@counts;
1.191 bowersj2 5906: }
5907:
5908: =pod
5909:
5910: B<Completable>
5911:
5912: The completable method represents the concept of I<whether the student can
5913: currently do the problem>. If the student can do the problem, which means
5914: that it is open, there are tries left, and if the problem is manually graded
5915: or the grade is suppressed via problemstatus, the student has not tried it
5916: yet, then the method returns 1. Otherwise, it returns 0, to indicate that
5917: either the student has tried it and there is no feedback, or that for
5918: some reason it is no longer completable (not open yet, successfully completed,
5919: out of tries, etc.). As an example, this is used as the filter for the
5920: "Uncompleted Homework" option for the nav maps.
5921:
5922: If this does not quite meet your needs, do not fiddle with it (unless you are
5923: fixing it to better match the student's conception of "completable" because
5924: it's broken somehow)... make a new method.
5925:
5926: =cut
5927:
5928: sub completable {
5929: my $self = shift;
5930: if (!$self->is_problem()) { return 0; }
5931: my $partCount = $self->countParts();
5932:
5933: foreach my $part (@{$self->parts()}) {
5934: if ($part eq '0' && $partCount != 1) { next; }
5935: my $status = $self->status($part);
5936: # "If any of the parts are open, or have tries left (implies open),
5937: # and it is not "attempted" (manually graded problem), it is
5938: # not "complete"
1.216 bowersj2 5939: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
1.450 raeburn 5940: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
1.216 bowersj2 5941: $status == ANSWER_SUBMITTED() ) {
5942: # did this part already, as well as we can
5943: next;
5944: }
5945: if ($status == OPEN() || $status == TRIES_LEFT()) {
5946: return 1;
5947: }
1.191 bowersj2 5948: }
5949:
5950: # If all the parts were complete, so was this problem.
1.216 bowersj2 5951: return 0;
1.51 bowersj2 5952: }
5953:
5954: =pod
5955:
1.507 raeburn 5956: B<Answerable>
5957:
5958: The answerable method differs from the completable method in its handling of problem parts
5959: for which feedback on correctness is suppressed, but the student still has tries left, and
5960: the problem part is not past due, (i.e., the student could submit a different answer if
5961: he/she so chose). For that case completable will return 0, whereas answerable will return 1.
5962:
5963: =cut
5964:
5965: sub answerable {
5966: my $self = shift;
5967: if (!$self->is_problem()) { return 0; }
5968: my $partCount = $self->countParts();
5969: foreach my $part (@{$self->parts()}) {
5970: if ($part eq '0' && $partCount != 1) { next; }
5971: my $status = $self->status($part);
5972: if ($self->getCompletionStatus($part) == ATTEMPTED() ||
5973: $self->getCompletionStatus($part) == CREDIT_ATTEMPTED() ||
5974: $status == ANSWER_SUBMITTED() ) {
5975: if ($self->tries($part) < $self->maxtries($part) || !$self->maxtries($part)) {
5976: return 1;
5977: }
5978: }
5979: if ($status == OPEN() || $status == TRIES_LEFT() || $status == NETWORK_FAILURE()) {
5980: return 1;
5981: }
5982: }
5983: # None of the parts were answerable, so neither is this problem.
5984: return 0;
5985: }
5986:
5987: =pod
5988:
1.51 bowersj2 5989: =head2 Resource/Nav Map Navigation
5990:
5991: =over 4
5992:
1.174 albertel 5993: =item * B<getNext>():
5994:
5995: Retreive an array of the possible next resources after this
5996: one. Always returns an array, even in the one- or zero-element case.
5997:
5998: =item * B<getPrevious>():
1.85 bowersj2 5999:
1.174 albertel 6000: Retreive an array of the possible previous resources from this
6001: one. Always returns an array, even in the one- or zero-element case.
1.51 bowersj2 6002:
6003: =cut
6004:
6005: sub getNext {
6006: my $self = shift;
6007: my @branches;
6008: my $to = $self->to();
1.85 bowersj2 6009: foreach my $branch ( split(/,/, $to) ) {
1.51 bowersj2 6010: my $choice = $self->{NAV_MAP}->getById($branch);
1.342 albertel 6011: #if (!$choice->condition()) { next; }
1.51 bowersj2 6012: my $next = $choice->goesto();
6013: $next = $self->{NAV_MAP}->getById($next);
6014:
1.131 bowersj2 6015: push @branches, $next;
1.85 bowersj2 6016: }
6017: return \@branches;
6018: }
6019:
6020: sub getPrevious {
6021: my $self = shift;
6022: my @branches;
6023: my $from = $self->from();
1.504 raeburn 6024: foreach my $branch ( split(/,/, $from)) {
1.85 bowersj2 6025: my $choice = $self->{NAV_MAP}->getById($branch);
6026: my $prev = $choice->comesfrom();
6027: $prev = $self->{NAV_MAP}->getById($prev);
6028:
1.131 bowersj2 6029: push @branches, $prev;
1.51 bowersj2 6030: }
6031: return \@branches;
1.131 bowersj2 6032: }
6033:
6034: sub browsePriv {
6035: my $self = shift;
1.505 raeburn 6036: my $noblockcheck = shift;
1.131 bowersj2 6037: if (defined($self->{BROWSE_PRIV})) {
6038: return $self->{BROWSE_PRIV};
6039: }
6040:
1.311 albertel 6041: $self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
1.508 damieng 6042: $self->{SYMB},undef,
1.505 raeburn 6043: undef,$noblockcheck);
1.51 bowersj2 6044: }
6045:
6046: =pod
1.2 www 6047:
1.51 bowersj2 6048: =back
1.2 www 6049:
1.51 bowersj2 6050: =cut
1.2 www 6051:
1.51 bowersj2 6052: 1;
1.2 www 6053:
1.51 bowersj2 6054: __END__
1.2 www 6055:
6056:
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